21112020020120 has 64 divisors (see below), whose sum is σ = 48043250115840. Its totient is φ = 8349123888000.

The previous prime is 21112020020093. The next prime is 21112020020167. The reversal of 21112020020120 is 2102002021112.

It is a junction number, because it is equal to n+sod(n) for n = 21112020020095 and 21112020020104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7008422 + ... + 9557301.

It is an arithmetic number, because the mean of its divisors is an integer number (750675783060).

Almost surely, 2^{21112020020120} is an apocalyptic number.

21112020020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112020020120 is an abundant number, since it is smaller than the sum of its proper divisors (26931230095720).

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

21112020020120 is a wasteful number, since it uses less digits than its factorization.

21112020020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566096 (or 16566092 counting only the distinct ones).

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

Adding to 21112020020120 its reverse (2102002021112), we get a palindrome (23214022041232).

The spelling of 21112020020120 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty thousand, one hundred twenty".