21211023102120 has 96 divisors (see below), whose sum is σ = 69964718073120. Its totient is φ = 5571850838400.

The previous prime is 21211023102109. The next prime is 21211023102163. The reversal of 21211023102120 is 2120132011212.

21211023102120 is a `hidden beast` number, since 21 + 21 + 102 + 310 + 212 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21211023102093 and 21211023102102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 439673706 + ... + 439721945.

It is an arithmetic number, because the mean of its divisors is an integer number (728799146595).

Almost surely, 2^{21211023102120} is an apocalyptic number.

21211023102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211023102120 is an abundant number, since it is smaller than the sum of its proper divisors (48753694971000).

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

21211023102120 is a wasteful number, since it uses less digits than its factorization.

21211023102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879395735 (or 879395728 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21211023102120 its reverse (2120132011212), we get a palindrome (23331155113332).

The spelling of 21211023102120 in words is "twenty-one trillion, two hundred eleven billion, twenty-three million, one hundred two thousand, one hundred twenty".