21232112210 has 16 divisors (see below), whose sum is σ = 40229265600. Its totient is φ = 8045852976.

The previous prime is 21232112207. The next prime is 21232112303. The reversal of 21232112210 is 1221123212.

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, 55873790 + ... + 55874169.

It is an arithmetic number, because the mean of its divisors is an integer number (2514329100).

Almost surely, 2^21232112210 is an apocalyptic number.

21232112210 is a deficient number, since it is larger than the sum of its proper divisors (18997153390).

21232112210 is a wasteful number, since it uses less digits than its factorization.

21232112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111747985.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21232112210 its reverse (1221123212), we get a palindrome (22453235422).

The spelling of 21232112210 in words is "twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, two hundred ten".