21131020030000 has 100 divisors (see below), whose sum is σ = 51499126291888. Its totient is φ = 8396431200000.

The previous prime is 21131020029979. The next prime is 21131020030007. The reversal of 21131020030000 is 3002013112.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×21131020030000² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21131020030007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5487027 + ... + 8507026.

Almost surely, 2^{21131020030000} is an apocalyptic number.

21131020030000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131020030000 is an abundant number, since it is smaller than the sum of its proper divisors (30368106261888).

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

21131020030000 is a wasteful number, since it uses less digits than its factorization.

21131020030000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13994232 (or 13994211 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21131020030000 its reverse (3002013112), we get a palindrome (21134022043112).

The spelling of 21131020030000 in words is "twenty-one trillion, one hundred thirty-one billion, twenty million, thirty thousand".