21231134331 has 96 divisors (see below), whose sum is σ = 33927413760. Its totient is φ = 11677512000.

The previous prime is 21231134329. The next prime is 21231134357. The reversal of 21231134331 is 13343113212.

It is not a de Polignac number, because 21231134331 - 2¹ = 21231134329 is a prime.

It is a super-2 number, since 2×21231134331² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231134311) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 118609600 + ... + 118609778.

It is an arithmetic number, because the mean of its divisors is an integer number (353410560).

Almost surely, 2^21231134331 is an apocalyptic number.

21231134331 is a deficient number, since it is larger than the sum of its proper divisors (12696279429).

21231134331 is a wasteful number, since it uses less digits than its factorization.

21231134331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 318 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 21231134331 its reverse (13343113212), we get a palindrome (34574247543).

It can be divided in two parts, 212311 and 34331, that added together give a palindrome (246642).

The spelling of 21231134331 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty-four thousand, three hundred thirty-one".