100312221331 has 4 divisors (see below), whose sum is σ = 114642538672. Its totient is φ = 85981903992.

The previous prime is 100312221301. The next prime is 100312221337. The reversal of 100312221331 is 133122213001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100312221331 - 2⁵ = 100312221299 is a prime.

It is a super-2 number, since 2×100312221331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100312221299 and 100312221308.

It is not an unprimeable number, because it can be changed into a prime (100312221337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7165158660 + ... + 7165158673.

It is an arithmetic number, because the mean of its divisors is an integer number (28660634668).

Almost surely, 2^100312221331 is an apocalyptic number.

100312221331 is a deficient number, since it is larger than the sum of its proper divisors (14330317341).

100312221331 is an equidigital number, since it uses as much as digits as its factorization.

100312221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330317340.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 100312221331 its reverse (133122213001), we get a palindrome (233434434332).

The spelling of 100312221331 in words is "one hundred billion, three hundred twelve million, two hundred twenty-one thousand, three hundred thirty-one".