21232644623212 has 36 divisors (see below), whose sum is σ = 42780757934376. Its totient is φ = 9143244089280.

The previous prime is 21232644623149. The next prime is 21232644623303.

21232644623212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21232644623212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668349913 + ... + 668381680.

It is an arithmetic number, because the mean of its divisors is an integer number (1188354387066).

Almost surely, 2^{21232644623212} is an apocalyptic number.

21232644623212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21232644623212 is an abundant number, since it is smaller than the sum of its proper divisors (21548113311164).

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

21232644623212 is a wasteful number, since it uses less digits than its factorization.

21232644623212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336731646 (or 1336731625 counting only the distinct ones).

The product of its digits is 331776, while the sum is 40.

It can be divided in two parts, 2123264 and 4623212, that added together give a palindrome (6746476).

The spelling of 21232644623212 in words is "twenty-one trillion, two hundred thirty-two billion, six hundred forty-four million, six hundred twenty-three thousand, two hundred twelve".