21325131312986 has 8 divisors (see below), whose sum is σ = 32067466788564. Its totient is φ = 10635975716800.

The previous prime is 21325131312943. The next prime is 21325131313019. The reversal of 21325131312986 is 68921313152312.

It can be written as a sum of positive squares in 2 ways, for example, as 13953444755761 + 7371686557225 = 3735431^2 + 2715085^2 .

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

It is a super-2 number, since 2×21325131312986² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21325131312986.

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, 13294968845 + ... + 13294970448.

Almost surely, 2^{21325131312986} is an apocalyptic number.

21325131312986 is a deficient number, since it is larger than the sum of its proper divisors (10742335475578).

21325131312986 is a wasteful number, since it uses less digits than its factorization.

21325131312986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26589939696.

The product of its digits is 466560, while the sum is 47.

The spelling of 21325131312986 in words is "twenty-one trillion, three hundred twenty-five billion, one hundred thirty-one million, three hundred twelve thousand, nine hundred eighty-six".