1021112120 has 32 divisors (see below), whose sum is σ = 2625717600. Its totient is φ = 350095488.

The previous prime is 1021112111. The next prime is 1021112153. The reversal of 1021112120 is 212111201.

It is a super-2 number, since 2×1021112120² = 2085339923221788800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823135 + ... + 1823694.

It is an arithmetic number, because the mean of its divisors is an integer number (82053675).

Almost surely, 2^1021112120 is an apocalyptic number.

1021112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021112120 is an abundant number, since it is smaller than the sum of its proper divisors (1604605480).

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

1021112120 is a wasteful number, since it uses less digits than its factorization.

1021112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646847 (or 3646843 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1021112120 is about 31954.8450160535. The cubic root of 1021112120 is about 1006.9884215309.

Adding to 1021112120 its reverse (212111201), we get a palindrome (1233223321).

The spelling of 1021112120 in words is "one billion, twenty-one million, one hundred twelve thousand, one hundred twenty".