21130111000 has 32 divisors (see below), whose sum is σ = 49444462080. Its totient is φ = 8452044000.

The previous prime is 21130110941. The next prime is 21130111021. The reversal of 21130111000 is 11103112.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 10564056 + ... + 10566055.

It is an arithmetic number, because the mean of its divisors is an integer number (1545139440).

Almost surely, 2^21130111000 is an apocalyptic number.

21130111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130111000 is an abundant number, since it is smaller than the sum of its proper divisors (28314351080).

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

21130111000 is a wasteful number, since it uses less digits than its factorization.

21130111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21130132 (or 21130118 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 21130111000 its reverse (11103112), we get a palindrome (21141214112).

The spelling of 21130111000 in words is "twenty-one billion, one hundred thirty million, one hundred eleven thousand".