21233644633212 has 48 divisors (see below), whose sum is σ = 54058631894400. Its totient is φ = 6433324119360.

The previous prime is 21233644633189. The next prime is 21233644633219.

21233644633212 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233644633219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13154887 + ... + 14680542.

It is an arithmetic number, because the mean of its divisors is an integer number (1126221497800).

Almost surely, 2^{21233644633212} is an apocalyptic number.

21233644633212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21233644633212 is an abundant number, since it is smaller than the sum of its proper divisors (32824987261188).

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

21233644633212 is a wasteful number, since it uses less digits than its factorization.

21233644633212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27841226 (or 27841224 counting only the distinct ones).

The product of its digits is 746496, while the sum is 42.

It can be divided in two parts, 2123364 and 4633212, that added together give a palindrome (6756576).

The spelling of 21233644633212 in words is "twenty-one trillion, two hundred thirty-three billion, six hundred forty-four million, six hundred thirty-three thousand, two hundred twelve".