1021210110120 has 64 divisors (see below), whose sum is σ = 3063737214720. Its totient is φ = 272313195264.

The previous prime is 1021210110073. The next prime is 1021210110121. The reversal of 1021210110120 is 210110121201.

It is a super-2 number, since 2×1021210110120² (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 = 1021210110096 and 1021210110105.

It is not an unprimeable number, because it can be changed into a prime (1021210110121) 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, 3724782 + ... + 3989538.

It is an arithmetic number, because the mean of its divisors is an integer number (47870893980).

Almost surely, 2^{1021210110120} is an apocalyptic number.

1021210110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021210110120 is an abundant number, since it is smaller than the sum of its proper divisors (2042527104600).

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

1021210110120 is a wasteful number, since it uses less digits than its factorization.

1021210110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296914 (or 296910 counting only the distinct ones).

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

Adding to 1021210110120 its reverse (210110121201), we get a palindrome (1231320231321).

The spelling of 1021210110120 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred ten thousand, one hundred twenty".