100321221031 has 8 divisors (see below), whose sum is σ = 102464008560. Its totient is φ = 98187690432.

The previous prime is 100321220999. The next prime is 100321221043. The reversal of 100321221031 is 130122123001.

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

It is a cyclic number.

It is not a de Polignac number, because 100321221031 - 2⁵ = 100321220999 is a prime.

It is a super-2 number, since 2×100321221031² (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 = 100321220996 and 100321221014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321221331) 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, 2292325 + ... + 2335678.

It is an arithmetic number, because the mean of its divisors is an integer number (12808001070).

Almost surely, 2^100321221031 is an apocalyptic number.

100321221031 is a deficient number, since it is larger than the sum of its proper divisors (2142787529).

100321221031 is an equidigital number, since it uses as much as digits as its factorization.

100321221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628465.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100321221031 its reverse (130122123001), we get a palindrome (230443344032).

The spelling of 100321221031 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand, thirty-one".