21021120002120 has 32 divisors (see below), whose sum is σ = 54054308577600. Its totient is φ = 7207241143488.

The previous prime is 21021120002119. The next prime is 21021120002143. The reversal of 21021120002120 is 2120002112012.

It is a super-2 number, since 2×21021120002120² (a number of 27 digits) contains 22 as substring.

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 = 21021120002095 and 21021120002104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37537714010 + ... + 37537714569.

It is an arithmetic number, because the mean of its divisors is an integer number (1689197143050).

Almost surely, 2^{21021120002120} is an apocalyptic number.

21021120002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021120002120 is an abundant number, since it is smaller than the sum of its proper divisors (33033188575480).

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

21021120002120 is a wasteful number, since it uses less digits than its factorization.

21021120002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75075428597 (or 75075428593 counting only the distinct ones).

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

Adding to 21021120002120 its reverse (2120002112012), we get a palindrome (23141122114132).

The spelling of 21021120002120 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, two thousand, one hundred twenty".