100312133221 has 8 divisors (see below), whose sum is σ = 105598228320. Its totient is φ = 95026689072.

The previous prime is 100312133219. The next prime is 100312133293. The reversal of 100312133221 is 122331213001.

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

It is not a de Polignac number, because 100312133221 - 2¹ = 100312133219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100312137221) 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, 171171 + ... + 479503.

It is an arithmetic number, because the mean of its divisors is an integer number (13199778540).

Almost surely, 2^100312133221 is an apocalyptic number.

It is an amenable number.

100312133221 is a deficient number, since it is larger than the sum of its proper divisors (5286095099).

100312133221 is a wasteful number, since it uses less digits than its factorization.

100312133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325475.

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

Adding to 100312133221 its reverse (122331213001), we get a palindrome (222643346222).

The spelling of 100312133221 in words is "one hundred billion, three hundred twelve million, one hundred thirty-three thousand, two hundred twenty-one".