221100122031 has 32 divisors (see below), whose sum is σ = 314975692800. Its totient is φ = 137651015040.

The previous prime is 221100122011. The next prime is 221100122053. The reversal of 221100122031 is 130221001122.

It is not a de Polignac number, because 221100122031 - 2⁵ = 221100121999 is a prime.

It is a super-2 number, since 2×221100122031² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221100122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100122011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5121685 + ... + 5164673.

It is an arithmetic number, because the mean of its divisors is an integer number (9842990400).

Almost surely, 2^221100122031 is an apocalyptic number.

221100122031 is a deficient number, since it is larger than the sum of its proper divisors (93875570769).

221100122031 is a wasteful number, since it uses less digits than its factorization.

221100122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44959.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221100122031 its reverse (130221001122), we get a palindrome (351321123153).

The spelling of 221100122031 in words is "two hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, thirty-one".