21313212110 has 8 divisors (see below), whose sum is σ = 38363781816. Its totient is φ = 8525284840.

The previous prime is 21313212061. The next prime is 21313212169. The reversal of 21313212110 is 1121231312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065660596 + ... + 1065660615.

It is an arithmetic number, because the mean of its divisors is an integer number (4795472727).

Almost surely, 2^21313212110 is an apocalyptic number.

21313212110 is a deficient number, since it is larger than the sum of its proper divisors (17050569706).

21313212110 is a wasteful number, since it uses less digits than its factorization.

21313212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131321218.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21313212110 its reverse (1121231312), we get a palindrome (22434443422).

The spelling of 21313212110 in words is "twenty-one billion, three hundred thirteen million, two hundred twelve thousand, one hundred ten".