21213233230 has 32 divisors (see below), whose sum is σ = 43644113856. Its totient is φ = 7272198144.

The previous prime is 21213233227. The next prime is 21213233317. The reversal of 21213233230 is 3233231212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787342 + ... + 813838.

It is an arithmetic number, because the mean of its divisors is an integer number (1363878558).

Almost surely, 2^21213233230 is an apocalyptic number.

21213233230 is an abundant number, since it is smaller than the sum of its proper divisors (22430880626).

21213233230 is a wasteful number, since it uses less digits than its factorization.

21213233230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37948.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21213233230 its reverse (3233231212), we get a palindrome (24446464442).

The spelling of 21213233230 in words is "twenty-one billion, two hundred thirteen million, two hundred thirty-three thousand, two hundred thirty".