21300031131031 has 8 divisors (see below), whose sum is σ = 21427800022944. Its totient is φ = 21172264903680.

The previous prime is 21300031131017. The next prime is 21300031131073. The reversal of 21300031131031 is 13013113000312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21300031131031 - 2¹⁵ = 21300031098263 is a prime.

It is a super-2 number, since 2×21300031131031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300011131031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16727311 + ... + 17955583.

It is an arithmetic number, because the mean of its divisors is an integer number (2678475002868).

Almost surely, 2^{21300031131031} is an apocalyptic number.

21300031131031 is a deficient number, since it is larger than the sum of its proper divisors (127768891913).

21300031131031 is a wasteful number, since it uses less digits than its factorization.

21300031131031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332281.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21300031131031 its reverse (13013113000312), we get a palindrome (34313144131343).

The spelling of 21300031131031 in words is "twenty-one trillion, three hundred billion, thirty-one million, one hundred thirty-one thousand, thirty-one".