1212222012120 has 128 divisors (see below), whose sum is σ = 4617988646400. Its totient is φ = 277079315328.

The previous prime is 1212222012119. The next prime is 1212222012121. The reversal of 1212222012120 is 212102222121.

It is a happy number.

1212222012120 is a `hidden beast` number, since 121 + 222 + 201 + 2 + 120 = 666.

It is an interprime number because it is at equal distance from previous prime (1212222012119) and next prime (1212222012121).

It is a super-2 number, since 2×1212222012120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212222012093 and 1212222012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80165854 + ... + 80180973.

It is an arithmetic number, because the mean of its divisors is an integer number (36078036300).

Almost surely, 2^{1212222012120} is an apocalyptic number.

1212222012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212222012120 is an abundant number, since it is smaller than the sum of its proper divisors (3405766634280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212222012120 is a wasteful number, since it uses less digits than its factorization.

1212222012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160346854 (or 160346844 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212222012120 its reverse (212102222121), we get a palindrome (1424324234241).

The spelling of 1212222012120 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, twelve thousand, one hundred twenty".