100021312131 has 16 divisors (see below), whose sum is σ = 143654290080. Its totient is φ = 61537029120.

The previous prime is 100021312117. The next prime is 100021312151. The reversal of 100021312131 is 131213120001.

It is a happy number.

It is not a de Polignac number, because 100021312131 - 2⁹ = 100021311619 is a prime.

It is a super-2 number, since 2×100021312131² (a number of 23 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 100021312131.

It is not an unprimeable number, because it can be changed into a prime (100021312151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134766 + ... + 467123.

It is an arithmetic number, because the mean of its divisors is an integer number (8978393130).

Almost surely, 2^100021312131 is an apocalyptic number.

100021312131 is a deficient number, since it is larger than the sum of its proper divisors (43632977949).

100021312131 is a wasteful number, since it uses less digits than its factorization.

100021312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606166.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 100021312131 its reverse (131213120001), we get a palindrome (231234432132).

The spelling of 100021312131 in words is "one hundred billion, twenty-one million, three hundred twelve thousand, one hundred thirty-one".