21031030303231 has 48 divisors (see below), whose sum is σ = 24119664565248. Its totient is φ = 18225923918400.

The previous prime is 21031030303219. The next prime is 21031030303273. The reversal of 21031030303231 is 13230303013012.

It is not a de Polignac number, because 21031030303231 - 2²⁷ = 21030896085503 is a prime.

It is a super-2 number, since 2×21031030303231² (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 (21031030333231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259374426 + ... + 259455496.

It is an arithmetic number, because the mean of its divisors is an integer number (502493011776).

Almost surely, 2^{21031030303231} is an apocalyptic number.

21031030303231 is a deficient number, since it is larger than the sum of its proper divisors (3088634262017).

21031030303231 is a wasteful number, since it uses less digits than its factorization.

21031030303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81620 (or 81601 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21031030303231 its reverse (13230303013012), we get a palindrome (34261333316243).

The spelling of 21031030303231 in words is "twenty-one trillion, thirty-one billion, thirty million, three hundred three thousand, two hundred thirty-one".