21103522210 has 8 divisors (see below), whose sum is σ = 37986339996. Its totient is φ = 8441408880.

The previous prime is 21103522207. The next prime is 21103522291. The reversal of 21103522210 is 1222530112.

It can be written as a sum of positive squares in 2 ways, for example, as 20965012849 + 138509361 = 144793^2 + 11769^2 .

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

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, 1055176101 + ... + 1055176120.

Almost surely, 2^21103522210 is an apocalyptic number.

21103522210 is a deficient number, since it is larger than the sum of its proper divisors (16882817786).

21103522210 is a wasteful number, since it uses less digits than its factorization.

21103522210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110352228.

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 21103522210 in words is "twenty-one billion, one hundred three million, five hundred twenty-two thousand, two hundred ten".