21231610010 has 16 divisors (see below), whose sum is σ = 41156659656. Its totient is φ = 7839363648.

The previous prime is 21231609947. The next prime is 21231610033. The reversal of 21231610010 is 1001613212.

It can be written as a sum of positive squares in 4 ways, for example, as 15992890369 + 5238719641 = 126463^2 + 72379^2 .

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, 81659909 + ... + 81660168.

Almost surely, 2^21231610010 is an apocalyptic number.

21231610010 is a deficient number, since it is larger than the sum of its proper divisors (19925049646).

21231610010 is a wasteful number, since it uses less digits than its factorization.

21231610010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163320097.

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

The spelling of 21231610010 in words is "twenty-one billion, two hundred thirty-one million, six hundred ten thousand, ten".