21231331123110 has 16 divisors (see below), whose sum is σ = 50955194695536. Its totient is φ = 5661688299488.

The previous prime is 21231331123103. The next prime is 21231331123111. The reversal of 21231331123110 is 1132113313212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231331123111) 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, 353855518689 + ... + 353855518748.

It is an arithmetic number, because the mean of its divisors is an integer number (3184699668471).

Almost surely, 2^{21231331123110} is an apocalyptic number.

21231331123110 is an abundant number, since it is smaller than the sum of its proper divisors (29723863572426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231331123110 is a wasteful number, since it uses less digits than its factorization.

21231331123110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707711037447.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21231331123110 its reverse (1132113313212), we get a palindrome (22363444436322).

The spelling of 21231331123110 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, one hundred twenty-three thousand, one hundred ten".