220131123 has 4 divisors (see below), whose sum is σ = 293508168. Its totient is φ = 146754080.

The previous prime is 220131089. The next prime is 220131133. The reversal of 220131123 is 321131022.

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 220131123 - 2¹⁷ = 220000051 is a prime.

It is a super-2 number, since 2×220131123² = 96915422626482258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220131133) 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, 36688518 + ... + 36688523.

It is an arithmetic number, because the mean of its divisors is an integer number (73377042).

Almost surely, 2^220131123 is an apocalyptic number.

220131123 is a deficient number, since it is larger than the sum of its proper divisors (73377045).

220131123 is an equidigital number, since it uses as much as digits as its factorization.

220131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73377044.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 220131123 is about 14836.8164711976. The cubic root of 220131123 is about 603.8009839109.

Adding to 220131123 its reverse (321131022), we get a palindrome (541262145).

The spelling of 220131123 in words is "two hundred twenty million, one hundred thirty-one thousand, one hundred twenty-three".