21213210110 has 8 divisors (see below), whose sum is σ = 38183778216. Its totient is φ = 8485284040.

The previous prime is 21213210103. The next prime is 21213210143. The reversal of 21213210110 is 1101231212.

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

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, 1060660496 + ... + 1060660515.

It is an arithmetic number, because the mean of its divisors is an integer number (4772972277).

Almost surely, 2^21213210110 is an apocalyptic number.

21213210110 is a deficient number, since it is larger than the sum of its proper divisors (16970568106).

21213210110 is a wasteful number, since it uses less digits than its factorization.

21213210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121321018.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21213210110 its reverse (1101231212), we get a palindrome (22314441322).

The spelling of 21213210110 in words is "twenty-one billion, two hundred thirteen million, two hundred ten thousand, one hundred ten".