1212202122012 has 72 divisors (see below), whose sum is σ = 3507883456896. Its totient is φ = 345753398304.

The previous prime is 1212202122011. The next prime is 1212202122059. The reversal of 1212202122012 is 2102212022121.

It is a happy number.

It is a super-2 number, since 2×1212202122012² (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212202122011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3949458 + ... + 4245305.

It is an arithmetic number, because the mean of its divisors is an integer number (48720603568).

Almost surely, 2^{1212202122012} is an apocalyptic number.

1212202122012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212202122012 is an abundant number, since it is smaller than the sum of its proper divisors (2295681334884).

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

1212202122012 is a wasteful number, since it uses less digits than its factorization.

1212202122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195367 (or 8195362 counting only the distinct ones).

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

Adding to 1212202122012 its reverse (2102212022121), we get a palindrome (3314414144133).

The spelling of 1212202122012 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred twenty-two thousand, twelve".