213000220091 has 2 divisors, whose sum is σ = 213000220092. Its totient is φ = 213000220090.

The previous prime is 213000220067. The next prime is 213000220099. The reversal of 213000220091 is 190022000312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213000220091 is a prime.

It is not a weakly prime, because it can be changed into another prime (213000220099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106500110045 + 106500110046.

It is an arithmetic number, because the mean of its divisors is an integer number (106500110046).

Almost surely, 2^213000220091 is an apocalyptic number.

213000220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213000220091 is an equidigital number, since it uses as much as digits as its factorization.

213000220091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 213000220091 in words is "two hundred thirteen billion, two hundred twenty thousand, ninety-one".