21213522110 has 16 divisors (see below), whose sum is σ = 41655643632. Its totient is φ = 7714008000.

The previous prime is 21213522101. The next prime is 21213522149. The reversal of 21213522110 is 1122531212.

It is a super-2 number, since 2×21213522110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 96424991 + ... + 96425210.

It is an arithmetic number, because the mean of its divisors is an integer number (2603477727).

Almost surely, 2^21213522110 is an apocalyptic number.

21213522110 is a deficient number, since it is larger than the sum of its proper divisors (20442121522).

21213522110 is a wasteful number, since it uses less digits than its factorization.

21213522110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192850219.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 21213522110 in words is "twenty-one billion, two hundred thirteen million, five hundred twenty-two thousand, one hundred ten".