21310936606129 has 9 divisors (see below), whose sum is σ = 21571176189913. Its totient is φ = 21053799790852.

The previous prime is 21310936606111. The next prime is 21310936606177. The reversal of 21310936606129 is 92160663901312.

The square root of 21310936606129 is 4616377.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 21310936606129 - 2⁹ = 21310936605617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310936606229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 383131482 + ... + 383187100.

Almost surely, 2^{21310936606129} is an apocalyptic number.

21310936606129 is the 4616377-th square number.

21310936606129 is the 2308189-th centered octagonal number.

It is an amenable number.

21310936606129 is a deficient number, since it is larger than the sum of its proper divisors (260239583784).

21310936606129 is an frugal number, since it uses more digits than its factorization.

21310936606129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111404 (or 55702 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 21310936606129 in words is "twenty-one trillion, three hundred ten billion, nine hundred thirty-six million, six hundred six thousand, one hundred twenty-nine".