12011220023 has 16 divisors (see below), whose sum is σ = 13301252352. Its totient is φ = 10754520000.

The previous prime is 12011220019. The next prime is 12011220073. The reversal of 12011220023 is 32002211021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12011220023 - 2² = 12011220019 is a prime.

It is a super-2 number, since 2×12011220023² (a number of 21 digits) 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 (12011220073) 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, 813515 + ... + 828147.

It is an arithmetic number, because the mean of its divisors is an integer number (831328272).

Almost surely, 2^12011220023 is an apocalyptic number.

12011220023 is a deficient number, since it is larger than the sum of its proper divisors (1290032329).

12011220023 is a wasteful number, since it uses less digits than its factorization.

12011220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15766.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12011220023 its reverse (32002211021), we get a palindrome (44013431044).

The spelling of 12011220023 in words is "twelve billion, eleven million, two hundred twenty thousand, twenty-three".