21231231110022 has 16 divisors (see below), whose sum is σ = 42464259552240. Its totient is φ = 7076777481312.

The previous prime is 21231231109937. The next prime is 21231231110041. The reversal of 21231231110022 is 22001113213212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74735253 + ... + 75018800.

It is an arithmetic number, because the mean of its divisors is an integer number (2654016222015).

Almost surely, 2^{21231231110022} is an apocalyptic number.

21231231110022 is an abundant number, since it is smaller than the sum of its proper divisors (21233028442218).

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

21231231110022 is a wasteful number, since it uses less digits than its factorization.

21231231110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149777687.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21231231110022 its reverse (22001113213212), we get a palindrome (43232344323234).

The spelling of 21231231110022 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, twenty-two".