221100100223131 has 4 divisors (see below), whose sum is σ = 221100227947152. Its totient is φ = 221099972499112.

The previous prime is 221100100223113. The next prime is 221100100223161. The reversal of 221100100223131 is 131322001001122.

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 221100100223131 - 2²⁵ = 221100066668699 is a prime.

It is a super-2 number, since 2×221100100223131² (a number of 29 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 = 221100100223099 and 221100100223108.

It is not an unprimeable number, because it can be changed into a prime (221100100223161) 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, 61229215 + ... + 64739608.

It is an arithmetic number, because the mean of its divisors is an integer number (55275056986788).

Almost surely, 2^{221100100223131} is an apocalyptic number.

221100100223131 is a deficient number, since it is larger than the sum of its proper divisors (127724021).

221100100223131 is a wasteful number, since it uses less digits than its factorization.

221100100223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127724020.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221100100223131 its reverse (131322001001122), we get a palindrome (352422101224253).

The spelling of 221100100223131 in words is "two hundred twenty-one trillion, one hundred billion, one hundred million, two hundred twenty-three thousand, one hundred thirty-one".