252120019999 has 2 divisors, whose sum is σ = 252120020000. Its totient is φ = 252120019998.

The previous prime is 252120019969. The next prime is 252120020039. The reversal of 252120019999 is 999910021252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252120019999 - 2³⁷ = 114681066527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252120019909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126060009999 + 126060010000.

It is an arithmetic number, because the mean of its divisors is an integer number (126060010000).

Almost surely, 2^252120019999 is an apocalyptic number.

252120019999 is a deficient number, since it is larger than the sum of its proper divisors (1).

252120019999 is an equidigital number, since it uses as much as digits as its factorization.

252120019999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 252120019999 in words is "two hundred fifty-two billion, one hundred twenty million, nineteen thousand, nine hundred ninety-nine".