212122121199 has 4 divisors (see below), whose sum is σ = 282829494936. Its totient is φ = 141414747464.

The previous prime is 212122121171. The next prime is 212122121207. The reversal of 212122121199 is 991121221212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212122121199 - 2⁹ = 212122120687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212124121199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35353686864 + ... + 35353686869.

It is an arithmetic number, because the mean of its divisors is an integer number (70707373734).

Almost surely, 2^212122121199 is an apocalyptic number.

212122121199 is a deficient number, since it is larger than the sum of its proper divisors (70707373737).

212122121199 is an equidigital number, since it uses as much as digits as its factorization.

212122121199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70707373736.

The product of its digits is 2592, while the sum is 33.

The spelling of 212122121199 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred ninety-nine".