220031101 has 2 divisors, whose sum is σ = 220031102. Its totient is φ = 220031100.

The previous prime is 220031089. The next prime is 220031107. The reversal of 220031101 is 101130022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170328601 + 49702500 = 13051^2 + 7050^2 .

It is a cyclic number.

It is not a de Polignac number, because 220031101 - 2⁵ = 220031069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220031107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110015550 + 110015551.

It is an arithmetic number, because the mean of its divisors is an integer number (110015551).

Almost surely, 2^220031101 is an apocalyptic number.

It is an amenable number.

220031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

220031101 is an equidigital number, since it uses as much as digits as its factorization.

220031101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 220031101 is about 14833.4453516370. The cubic root of 220031101 is about 603.7095194380.

Adding to 220031101 its reverse (101130022), we get a palindrome (321161123).

It can be divided in two parts, 22003 and 1101, that added together give a square (23104 = 152²).

The spelling of 220031101 in words is "two hundred twenty million, thirty-one thousand, one hundred one".