21020211120 has 40 divisors (see below), whose sum is σ = 65162655216. Its totient is φ = 5605389568.

The previous prime is 21020211077. The next prime is 21020211131. The reversal of 21020211120 is 2111202012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21020211096 and 21020211105.

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, 43791867 + ... + 43792346.

Almost surely, 2^21020211120 is an apocalyptic number.

21020211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020211120 is an abundant number, since it is smaller than the sum of its proper divisors (44142444096).

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

21020211120 is a wasteful number, since it uses less digits than its factorization.

21020211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87584229 (or 87584223 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21020211120 its reverse (2111202012), we get a palindrome (23131413132).

The spelling of 21020211120 in words is "twenty-one billion, twenty million, two hundred eleven thousand, one hundred twenty".