21079751030361 has 21 divisors (see below), whose sum is σ = 31605354416901. Its totient is φ = 14053084710732.

The previous prime is 21079751030329. The next prime is 21079751030381. The reversal of 21079751030361 is 16303015797012.

The square root of 21079751030361 is 4591269.

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

21079751030361 is a `hidden beast` number, since 2 + 1 + 0 + 79 + 7 + 510 + 3 + 0 + 3 + 61 = 666.

It is not a de Polignac number, because 21079751030361 - 2⁵ = 21079751030329 is a prime.

It is a super-2 number, since 2×21079751030361² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21079751030311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 123879240 + ... + 124049286.

Almost surely, 2^{21079751030361} is an apocalyptic number.

21079751030361 is the 4591269-th square number.

21079751030361 is the 2295635-th centered octagonal number.

It is an amenable number.

21079751030361 is a deficient number, since it is larger than the sum of its proper divisors (10525603386540).

21079751030361 is an frugal number, since it uses more digits than its factorization.

21079751030361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340112 (or 170050 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 21079751030361 in words is "twenty-one trillion, seventy-nine billion, seven hundred fifty-one million, thirty thousand, three hundred sixty-one".