1021112202120 has 128 divisors (see below), whose sum is σ = 3249956044800. Its totient is φ = 255933893376.

The previous prime is 1021112202109. The next prime is 1021112202137. The reversal of 1021112202120 is 212022111201.

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 1021112202120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1473654 + ... + 2052773.

It is an arithmetic number, because the mean of its divisors is an integer number (25390281600).

Almost surely, 2^{1021112202120} is an apocalyptic number.

1021112202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021112202120 is an abundant number, since it is smaller than the sum of its proper divisors (2228843842680).

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

1021112202120 is a wasteful number, since it uses less digits than its factorization.

1021112202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526587 (or 3526583 counting only the distinct ones).

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

Adding to 1021112202120 its reverse (212022111201), we get a palindrome (1233134313321).

The spelling of 1021112202120 in words is "one trillion, twenty-one billion, one hundred twelve million, two hundred two thousand, one hundred twenty".