21122323210 has 32 divisors (see below), whose sum is σ = 38693251584. Its totient is φ = 8300208000.

The previous prime is 21122323207. The next prime is 21122323223. The reversal of 21122323210 is 1232322112.

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, 146575 + ... + 252445.

It is an arithmetic number, because the mean of its divisors is an integer number (1209164112).

Almost surely, 2^21122323210 is an apocalyptic number.

21122323210 is a deficient number, since it is larger than the sum of its proper divisors (17570928374).

21122323210 is a wasteful number, since it uses less digits than its factorization.

21122323210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106230.

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

Adding to 21122323210 its reverse (1232322112), we get a palindrome (22354645322).

The spelling of 21122323210 in words is "twenty-one billion, one hundred twenty-two million, three hundred twenty-three thousand, two hundred ten".