12011311023 has 8 divisors (see below), whose sum is σ = 16355827968. Its totient is φ = 7837167384.

The previous prime is 12011310989. The next prime is 12011311027. The reversal of 12011311023 is 32011311021.

It is a happy number.

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

It is not a de Polignac number, because 12011311023 - 2⁹ = 12011310511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011310993 and 12011311011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011311027) 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, 42593161 + ... + 42593442.

It is an arithmetic number, because the mean of its divisors is an integer number (2044478496).

Almost surely, 2^12011311023 is an apocalyptic number.

12011311023 is a deficient number, since it is larger than the sum of its proper divisors (4344516945).

12011311023 is an equidigital number, since it uses as much as digits as its factorization.

12011311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85186653.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12011311023 its reverse (32011311021), we get a palindrome (44022622044).

The spelling of 12011311023 in words is "twelve billion, eleven million, three hundred eleven thousand, twenty-three".