213122099 has 2 divisors, whose sum is σ = 213122100. Its totient is φ = 213122098.

The previous prime is 213122093. The next prime is 213122137. The reversal of 213122099 is 990221312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213122099 - 2²⁰ = 212073523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213122093) 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, 106561049 + 106561050.

It is an arithmetic number, because the mean of its divisors is an integer number (106561050).

Almost surely, 2^213122099 is an apocalyptic number.

213122099 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122099 is an equidigital number, since it uses as much as digits as its factorization.

213122099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 213122099 is about 14598.7019628459. The cubic root of 213122099 is about 597.3233538840.

The spelling of 213122099 in words is "two hundred thirteen million, one hundred twenty-two thousand, ninety-nine".