102220099991 has 2 divisors, whose sum is σ = 102220099992. Its totient is φ = 102220099990.

The previous prime is 102220099981. The next prime is 102220100051. The reversal of 102220099991 is 199990022201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102220099991 - 2³⁰ = 101146358167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102220099981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110049995 + 51110049996.

It is an arithmetic number, because the mean of its divisors is an integer number (51110049996).

Almost surely, 2^102220099991 is an apocalyptic number.

102220099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102220099991 is an equidigital number, since it uses as much as digits as its factorization.

102220099991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 102220099991 in words is "one hundred two billion, two hundred twenty million, ninety-nine thousand, nine hundred ninety-one".