102022201991 has 2 divisors, whose sum is σ = 102022201992. Its totient is φ = 102022201990.

The previous prime is 102022201987. The next prime is 102022202047. The reversal of 102022201991 is 199102220201.

It is a weak prime.

It is an emirp because it is prime and its reverse (199102220201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102022201991 - 2² = 102022201987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102022201291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011100995 + 51011100996.

It is an arithmetic number, because the mean of its divisors is an integer number (51011100996).

Almost surely, 2^102022201991 is an apocalyptic number.

102022201991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102022201991 is an equidigital number, since it uses as much as digits as its factorization.

102022201991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 102022201991 in words is "one hundred two billion, twenty-two million, two hundred one thousand, nine hundred ninety-one".