21213233333012 has 48 divisors (see below), whose sum is σ = 44513014318080. Its totient is φ = 8653883788800.

The previous prime is 21213233332939. The next prime is 21213233333041. The reversal of 21213233333012 is 21033333231212.

It is a super-2 number, since 2×21213233333012² (a number of 27 digits) contains 22 as substring.

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, 200268437 + ... + 200374332.

It is an arithmetic number, because the mean of its divisors is an integer number (927354464960).

Almost surely, 2^{21213233333012} is an apocalyptic number.

It is an amenable number.

21213233333012 is an abundant number, since it is smaller than the sum of its proper divisors (23299780985068).

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

21213233333012 is a wasteful number, since it uses less digits than its factorization.

21213233333012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400642872 (or 400642870 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21213233333012 its reverse (21033333231212), we get a palindrome (42246566564224).

The spelling of 21213233333012 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred thirty-three thousand, twelve".