21303131120 has 40 divisors (see below), whose sum is σ = 52443299664. Its totient is φ = 8020001792.

The previous prime is 21303131119. The next prime is 21303131131. The reversal of 21303131120 is 2113130312.

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 (17).

It is a congruent number.

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, 7830674 + ... + 7833393.

Almost surely, 2^21303131120 is an apocalyptic number.

21303131120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303131120 is an abundant number, since it is smaller than the sum of its proper divisors (31140168544).

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

21303131120 is a wasteful number, since it uses less digits than its factorization.

21303131120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15664097 (or 15664091 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21303131120 its reverse (2113130312), we get a palindrome (23416261432).

The spelling of 21303131120 in words is "twenty-one billion, three hundred three million, one hundred thirty-one thousand, one hundred twenty".