21213233321304 has 64 divisors (see below), whose sum is σ = 53898268147200. Its totient is φ = 6956366062464.

The previous prime is 21213233321237. The next prime is 21213233321321. The reversal of 21213233321304 is 40312333231212.

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, 19670502 + ... + 20720885.

It is an arithmetic number, because the mean of its divisors is an integer number (842160439800).

Almost surely, 2^{21213233321304} is an apocalyptic number.

21213233321304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21213233321304 is an abundant number, since it is smaller than the sum of its proper divisors (32685034825896).

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

21213233321304 is a wasteful number, since it uses less digits than its factorization.

21213233321304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40391752 (or 40391748 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 21213233321304 its reverse (40312333231212), we get a palindrome (61525566552516).

The spelling of 21213233321304 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred twenty-one thousand, three hundred four".