12133031021 has 2 divisors, whose sum is σ = 12133031022. Its totient is φ = 12133031020.

The previous prime is 12133031003. The next prime is 12133031117. The reversal of 12133031021 is 12013033121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9046672996 + 3086358025 = 95114^2 + 55555^2 .

It is an emirp because it is prime and its reverse (12013033121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12133031021 - 2⁶ = 12133030957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12133036021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6066515510 + 6066515511.

It is an arithmetic number, because the mean of its divisors is an integer number (6066515511).

Almost surely, 2^12133031021 is an apocalyptic number.

It is an amenable number.

12133031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12133031021 is an equidigital number, since it uses as much as digits as its factorization.

12133031021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12133031021 its reverse (12013033121), we get a palindrome (24146064142).

The spelling of 12133031021 in words is "twelve billion, one hundred thirty-three million, thirty-one thousand, twenty-one".