102112212091 has 2 divisors, whose sum is σ = 102112212092. Its totient is φ = 102112212090.

The previous prime is 102112212077. The next prime is 102112212133. The reversal of 102112212091 is 190212211201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102112212091 is a prime.

It is not a weakly prime, because it can be changed into another prime (102112212071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056106045 + 51056106046.

It is an arithmetic number, because the mean of its divisors is an integer number (51056106046).

Almost surely, 2^102112212091 is an apocalyptic number.

102112212091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102112212091 is an equidigital number, since it uses as much as digits as its factorization.

102112212091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 102112212091 its reverse (190212211201), we get a palindrome (292324423292).

The spelling of 102112212091 in words is "one hundred two billion, one hundred twelve million, two hundred twelve thousand, ninety-one".