12311021029 has 4 divisors (see below), whose sum is σ = 12311492076. Its totient is φ = 12310549984.

The previous prime is 12311021017. The next prime is 12311021033. The reversal of 12311021029 is 92012011321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92012011321 = 163 ⋅564490867.

It can be written as a sum of positive squares in 2 ways, for example, as 3696396804 + 8614624225 = 60798^2 + 92815^2 .

It is a cyclic number.

It is not a de Polignac number, because 12311021029 - 2⁷ = 12311020901 is a prime.

It is a super-2 number, since 2×12311021029² (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 (12311021059) 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, 193864 + ... + 249409.

It is an arithmetic number, because the mean of its divisors is an integer number (3077873019).

Almost surely, 2^12311021029 is an apocalyptic number.

It is an amenable number.

12311021029 is a deficient number, since it is larger than the sum of its proper divisors (471047).

12311021029 is an equidigital number, since it uses as much as digits as its factorization.

12311021029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471046.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 12311021029 in words is "twelve billion, three hundred eleven million, twenty-one thousand, twenty-nine".