100220320291 has 12 divisors (see below), whose sum is σ = 125550731712. Its totient is φ = 79295197968.

The previous prime is 100220320283. The next prime is 100220320301. The reversal of 100220320291 is 192023022001.

It is not a de Polignac number, because 100220320291 - 2³ = 100220320283 is a prime.

It is a super-2 number, since 2×100220320291² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100220324291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78665235 + ... + 78666508.

It is an arithmetic number, because the mean of its divisors is an integer number (10462560976).

Almost surely, 2^100220320291 is an apocalyptic number.

100220320291 is a deficient number, since it is larger than the sum of its proper divisors (25330411421).

100220320291 is a wasteful number, since it uses less digits than its factorization.

100220320291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157331770 (or 157331763 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 100220320291 its reverse (192023022001), we get a palindrome (292243342292).

The spelling of 100220320291 in words is "one hundred billion, two hundred twenty million, three hundred twenty thousand, two hundred ninety-one".