21231344313212 has 12 divisors (see below), whose sum is σ = 40532566416216. Its totient is φ = 9650611051440.

The previous prime is 21231344313211. The next prime is 21231344313247.

21231344313212 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231344313211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241265276243 + ... + 241265276330.

It is an arithmetic number, because the mean of its divisors is an integer number (3377713868018).

Almost surely, 2^{21231344313212} is an apocalyptic number.

21231344313212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21231344313212 is a deficient number, since it is larger than the sum of its proper divisors (19301222103004).

21231344313212 is a wasteful number, since it uses less digits than its factorization.

21231344313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482530552588 (or 482530552586 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

It can be divided in two parts, 2123134 and 4313212, that added together give a palindrome (6436346).

The spelling of 21231344313212 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred forty-four million, three hundred thirteen thousand, two hundred twelve".