212124025129 has 2 divisors, whose sum is σ = 212124025130. Its totient is φ = 212124025128.

The previous prime is 212124025111. The next prime is 212124025177. The reversal of 212124025129 is 921520421212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193491775129 + 18632250000 = 439877^2 + 136500^2 .

It is a cyclic number.

It is not a de Polignac number, because 212124025129 - 2²³ = 212115636521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212124025129.

It is not a weakly prime, because it can be changed into another prime (212124023129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106062012564 + 106062012565.

It is an arithmetic number, because the mean of its divisors is an integer number (106062012565).

Almost surely, 2^212124025129 is an apocalyptic number.

It is an amenable number.

212124025129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212124025129 is an equidigital number, since it uses as much as digits as its factorization.

212124025129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 212124025129 in words is "two hundred twelve billion, one hundred twenty-four million, twenty-five thousand, one hundred twenty-nine".