212102120999 has 2 divisors, whose sum is σ = 212102121000. Its totient is φ = 212102120998.

The previous prime is 212102120941. The next prime is 212102121017. The reversal of 212102120999 is 999021201212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212102120999 - 2²⁰ = 212101072423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212102123999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051060499 + 106051060500.

It is an arithmetic number, because the mean of its divisors is an integer number (106051060500).

Almost surely, 2^212102120999 is an apocalyptic number.

212102120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102120999 is an equidigital number, since it uses as much as digits as its factorization.

212102120999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 212102120999 in words is "two hundred twelve billion, one hundred two million, one hundred twenty thousand, nine hundred ninety-nine".