21231112310 has 16 divisors (see below), whose sum is σ = 38279600352. Its totient is φ = 8478312000.

The previous prime is 21231112249. The next prime is 21231112361. The reversal of 21231112310 is 1321113212.

21231112310 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21231112310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760306 + ... + 1772325.

It is an arithmetic number, because the mean of its divisors is an integer number (2392475022).

Almost surely, 2^21231112310 is an apocalyptic number.

21231112310 is a deficient number, since it is larger than the sum of its proper divisors (17048488042).

21231112310 is a wasteful number, since it uses less digits than its factorization.

21231112310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533239.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21231112310 its reverse (1321113212), we get a palindrome (22552225522).

The spelling of 21231112310 in words is "twenty-one billion, two hundred thirty-one million, one hundred twelve thousand, three hundred ten".