21120131000 has 32 divisors (see below), whose sum is σ = 49421108880. Its totient is φ = 8448052000.

The previous prime is 21120130981. The next prime is 21120131029. The reversal of 21120131000 is 13102112.

It is a super-2 number, since 2×21120131000² (a number of 21 digits) contains 22 as substring.

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, 10559066 + ... + 10561065.

Almost surely, 2^21120131000 is an apocalyptic number.

21120131000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120131000 is an abundant number, since it is smaller than the sum of its proper divisors (28300977880).

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

21120131000 is a wasteful number, since it uses less digits than its factorization.

21120131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21120152 (or 21120138 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21120131000 its reverse (13102112), we get a palindrome (21133233112).

It can be divided in two parts, 21 and 120131000, that added together give a palindrome (120131021).

The spelling of 21120131000 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-one thousand".