102222020109991 has 2 divisors, whose sum is σ = 102222020109992. Its totient is φ = 102222020109990.

The previous prime is 102222020109977. The next prime is 102222020110019. The reversal of 102222020109991 is 199901020222201.

It is a weak prime.

It is an emirp because it is prime and its reverse (199901020222201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102222020109991 - 2⁴⁵ = 67037648021159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102222020109791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51111010054995 + 51111010054996.

It is an arithmetic number, because the mean of its divisors is an integer number (51111010054996).

Almost surely, 2^{102222020109991} is an apocalyptic number.

102222020109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102222020109991 is an equidigital number, since it uses as much as digits as its factorization.

102222020109991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 102222020109991 in words is "one hundred two trillion, two hundred twenty-two billion, twenty million, one hundred nine thousand, nine hundred ninety-one".