1210211100120 has 128 divisors (see below), whose sum is σ = 3999906074880. Its totient is φ = 290479680000.

The previous prime is 1210211100113. The next prime is 1210211100143. The reversal of 1210211100120 is 210011120121.

It is a super-2 number, since 2×1210211100120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1210211100096 and 1210211100105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4405426 + ... + 4672065.

It is an arithmetic number, because the mean of its divisors is an integer number (31249266210).

Almost surely, 2^{1210211100120} is an apocalyptic number.

1210211100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210211100120 is an abundant number, since it is smaller than the sum of its proper divisors (2789694974760).

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

1210211100120 is a wasteful number, since it uses less digits than its factorization.

1210211100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077617 (or 9077613 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210211100120 its reverse (210011120121), we get a palindrome (1420222220241).

The spelling of 1210211100120 in words is "one trillion, two hundred ten billion, two hundred eleven million, one hundred thousand, one hundred twenty".