21223231210 has 16 divisors (see below), whose sum is σ = 38216209536. Its totient is φ = 8486093968.

The previous prime is 21223231207. The next prime is 21223231229. The reversal of 21223231210 is 1213232212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371854 + ... + 425113.

It is an arithmetic number, because the mean of its divisors is an integer number (2388513096).

Almost surely, 2^21223231210 is an apocalyptic number.

21223231210 is a deficient number, since it is larger than the sum of its proper divisors (16992978326).

21223231210 is a wasteful number, since it uses less digits than its factorization.

21223231210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799637.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21223231210 its reverse (1213232212), we get a palindrome (22436463422).

The spelling of 21223231210 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred ten".