21012312130131 has 8 divisors (see below), whose sum is σ = 32018761341184. Its totient is φ = 12007035502920.

The previous prime is 21012312130123. The next prime is 21012312130157. The reversal of 21012312130131 is 13103121321012.

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

It is not a de Polignac number, because 21012312130131 - 2³ = 21012312130123 is a prime.

It is a super-7 number, since 7×21012312130131⁷ (a number of 95 digits) contains 7777777 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1000586291911 = 21012312130131 / (2 + 1 + 0 + 1 + 2 + 3 + 1 + 2 + 1 + 3 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012312130098 and 21012312130107.

It is not an unprimeable number, because it can be changed into a prime (21012312130181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500293145935 + ... + 500293145976.

It is an arithmetic number, because the mean of its divisors is an integer number (4002345167648).

Almost surely, 2^{21012312130131} is an apocalyptic number.

21012312130131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21012312130131 is a deficient number, since it is larger than the sum of its proper divisors (11006449211053).

21012312130131 is a wasteful number, since it uses less digits than its factorization.

21012312130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000586291921.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21012312130131 its reverse (13103121321012), we get a palindrome (34115433451143).

The spelling of 21012312130131 in words is "twenty-one trillion, twelve billion, three hundred twelve million, one hundred thirty thousand, one hundred thirty-one".