1212211200120 has 64 divisors (see below), whose sum is σ = 3828035376000. Its totient is φ = 306242828928.

The previous prime is 1212211200113. The next prime is 1212211200127. The reversal of 1212211200120 is 210021122121.

It is an interprime number because it is at equal distance from previous prime (1212211200113) and next prime (1212211200127).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212211200120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211200127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265833510 + ... + 265838069.

It is an arithmetic number, because the mean of its divisors is an integer number (59813052750).

Almost surely, 2^{1212211200120} is an apocalyptic number.

1212211200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212211200120 is an abundant number, since it is smaller than the sum of its proper divisors (2615824175880).

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

1212211200120 is a wasteful number, since it uses less digits than its factorization.

1212211200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531671612 (or 531671608 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212211200120 its reverse (210021122121), we get a palindrome (1422232322241).

The spelling of 1212211200120 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred thousand, one hundred twenty".