21300203131 has 8 divisors (see below), whose sum is σ = 21822895584. Its totient is φ = 20783696640.

The previous prime is 21300203129. The next prime is 21300203153. The reversal of 21300203131 is 13130200312.

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 21300203131 - 2¹ = 21300203129 is a prime.

It is a super-2 number, since 2×21300203131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300203161) 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, 1539520 + ... + 1553293.

It is an arithmetic number, because the mean of its divisors is an integer number (2727861948).

Almost surely, 2^21300203131 is an apocalyptic number.

21300203131 is a deficient number, since it is larger than the sum of its proper divisors (522692453).

21300203131 is an equidigital number, since it uses as much as digits as its factorization.

21300203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092981.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21300203131 its reverse (13130200312), we get a palindrome (34430403443).

The spelling of 21300203131 in words is "twenty-one billion, three hundred million, two hundred three thousand, one hundred thirty-one".