11220023031 has 8 divisors (see below), whose sum is σ = 17097177984. Its totient is φ = 6411441720.

The previous prime is 11220022999. The next prime is 11220023057. The reversal of 11220023031 is 13032002211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11220023031 - 2⁵ = 11220022999 is a prime.

It is a super-2 number, since 2×11220023031² (a number of 21 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 11220023031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220023071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267143385 + ... + 267143426.

It is an arithmetic number, because the mean of its divisors is an integer number (2137147248).

Almost surely, 2^11220023031 is an apocalyptic number.

11220023031 is a deficient number, since it is larger than the sum of its proper divisors (5877154953).

11220023031 is an equidigital number, since it uses as much as digits as its factorization.

11220023031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534286821.

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

Adding to 11220023031 its reverse (13032002211), we get a palindrome (24252025242).

The spelling of 11220023031 in words is "eleven billion, two hundred twenty million, twenty-three thousand, thirty-one".