21231120310 has 16 divisors (see below), whose sum is σ = 40464017856. Its totient is φ = 7992892288.

The previous prime is 21231120307. The next prime is 21231120311. The reversal of 21231120310 is 1302113212.

It is a super-2 number, since 2×21231120310² (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 (21231120311) 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, 62444302 + ... + 62444641.

It is an arithmetic number, because the mean of its divisors is an integer number (2529001116).

Almost surely, 2^21231120310 is an apocalyptic number.

21231120310 is a deficient number, since it is larger than the sum of its proper divisors (19232897546).

21231120310 is a wasteful number, since it uses less digits than its factorization.

21231120310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124888967.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21231120310 its reverse (1302113212), we get a palindrome (22533233522).

The spelling of 21231120310 in words is "twenty-one billion, two hundred thirty-one million, one hundred twenty thousand, three hundred ten".