2123533129 has 2 divisors, whose sum is σ = 2123533130. Its totient is φ = 2123533128.

The previous prime is 2123533123. The next prime is 2123533151. The reversal of 2123533129 is 9213353212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1697028025 + 426505104 = 41195^2 + 20652^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123533129 - 2⁷ = 2123533001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2123533129.

It is not a weakly prime, because it can be changed into another prime (2123533123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061766564 + 1061766565.

It is an arithmetic number, because the mean of its divisors is an integer number (1061766565).

Almost surely, 2^2123533129 is an apocalyptic number.

It is an amenable number.

2123533129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123533129 is an equidigital number, since it uses as much as digits as its factorization.

2123533129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 2123533129 is about 46081.8090899218. The cubic root of 2123533129 is about 1285.3449046155.

The spelling of 2123533129 in words is "two billion, one hundred twenty-three million, five hundred thirty-three thousand, one hundred twenty-nine".