212112221871929 has 2 divisors, whose sum is σ = 212112221871930. Its totient is φ = 212112221871928.

The previous prime is 212112221871923. The next prime is 212112221871937. The reversal of 212112221871929 is 929178122211212.

212112221871929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157188530125225 + 54923691746704 = 12537485^2 + 7411052^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112221871929 - 2²⁰ = 212112220823353 is a prime.

It is not a weakly prime, because it can be changed into another prime (212112221871923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056110935964 + 106056110935965.

It is an arithmetic number, because the mean of its divisors is an integer number (106056110935965).

Almost surely, 2^{212112221871929} is an apocalyptic number.

It is an amenable number.

212112221871929 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112221871929 is an equidigital number, since it uses as much as digits as its factorization.

212112221871929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 50.

The spelling of 212112221871929 in words is "two hundred twelve trillion, one hundred twelve billion, two hundred twenty-one million, eight hundred seventy-one thousand, nine hundred twenty-nine".