213112091 has 2 divisors, whose sum is σ = 213112092. Its totient is φ = 213112090.

The previous prime is 213112087. The next prime is 213112103. The reversal of 213112091 is 190211312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213112091 - 2² = 213112087 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213112061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556045 + 106556046.

It is an arithmetic number, because the mean of its divisors is an integer number (106556046).

Almost surely, 2^213112091 is an apocalyptic number.

213112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213112091 is an equidigital number, since it uses as much as digits as its factorization.

213112091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 213112091 is about 14598.3591886212. The cubic root of 213112091 is about 597.3140038358.

The spelling of 213112091 in words is "two hundred thirteen million, one hundred twelve thousand, ninety-one".