21321122112312 has 64 divisors (see below), whose sum is σ = 59720096361600. Its totient is φ = 6286325927040.

The previous prime is 21321122112307. The next prime is 21321122112347.

21321122112312 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091366262 + ... + 1091385797.

It is an arithmetic number, because the mean of its divisors is an integer number (933126505650).

Almost surely, 2^{21321122112312} is an apocalyptic number.

21321122112312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21321122112312 is an abundant number, since it is smaller than the sum of its proper divisors (38398974249288).

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

21321122112312 is a wasteful number, since it uses less digits than its factorization.

21321122112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182752116 (or 2182752112 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

It can be divided in two parts, 2132112 and 2112312, that added together give a palindrome (4244424).

The spelling of 21321122112312 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, three hundred twelve".