21251040215110 has 32 divisors (see below), whose sum is σ = 38901745234080. Its totient is φ = 8356011276288.

The previous prime is 21251040215087. The next prime is 21251040215233. The reversal of 21251040215110 is 1151204015212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14519644 + ... + 15916096.

It is an arithmetic number, because the mean of its divisors is an integer number (1215679538565).

Almost surely, 2^{21251040215110} is an apocalyptic number.

21251040215110 is a deficient number, since it is larger than the sum of its proper divisors (17650705018970).

21251040215110 is a wasteful number, since it uses less digits than its factorization.

21251040215110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422312.

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 21251040215110 in words is "twenty-one trillion, two hundred fifty-one billion, forty million, two hundred fifteen thousand, one hundred ten".