1220023231 has 16 divisors (see below), whose sum is σ = 1487814400. Its totient is φ = 977116608.

The previous prime is 1220023213. The next prime is 1220023253. The reversal of 1220023231 is 1323200221.

It is a cyclic number.

It is not a de Polignac number, because 1220023231 - 2¹¹ = 1220021183 is a prime.

It is a super-2 number, since 2×1220023231² = 2976913368359358722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220023291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53121 + ... + 72538.

It is an arithmetic number, because the mean of its divisors is an integer number (92988400).

Almost surely, 2^1220023231 is an apocalyptic number.

1220023231 is a deficient number, since it is larger than the sum of its proper divisors (267791169).

1220023231 is a wasteful number, since it uses less digits than its factorization.

1220023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125758.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220023231 is about 34928.8309423605. The cubic root of 1220023231 is about 1068.5365123501.

Adding to 1220023231 its reverse (1323200221), we get a palindrome (2543223452).

The spelling of 1220023231 in words is "one billion, two hundred twenty million, twenty-three thousand, two hundred thirty-one".