21202011020120 has 128 divisors (see below), whose sum is σ = 56745450547200. Its totient is φ = 6975537440256.

The previous prime is 21202011020119. The next prime is 21202011020167. The reversal of 21202011020120 is 2102011020212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21202011020095 and 21202011020104.

It is a congruent number.

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, 6685904 + ... + 9333023.

It is an arithmetic number, because the mean of its divisors is an integer number (443323832400).

Almost surely, 2^{21202011020120} is an apocalyptic number.

21202011020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202011020120 is an abundant number, since it is smaller than the sum of its proper divisors (35543439527080).

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

21202011020120 is a wasteful number, since it uses less digits than its factorization.

21202011020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16019137 (or 16019133 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202011020120 its reverse (2102011020212), we get a palindrome (23304022040332).

The spelling of 21202011020120 in words is "twenty-one trillion, two hundred two billion, eleven million, twenty thousand, one hundred twenty".