2123252699929 has 2 divisors, whose sum is σ = 2123252699930. Its totient is φ = 2123252699928.

The previous prime is 2123252699891. The next prime is 2123252699977. The reversal of 2123252699929 is 9299962523212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1393466924304 + 729785775625 = 1180452^2 + 854275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123252699929 - 2¹⁹ = 2123252175641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123252679929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061626349964 + 1061626349965.

It is an arithmetic number, because the mean of its divisors is an integer number (1061626349965).

Almost surely, 2^{2123252699929} is an apocalyptic number.

It is an amenable number.

2123252699929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123252699929 is an equidigital number, since it uses as much as digits as its factorization.

2123252699929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 61.

The spelling of 2123252699929 in words is "two trillion, one hundred twenty-three billion, two hundred fifty-two million, six hundred ninety-nine thousand, nine hundred twenty-nine".