102101203991 has 2 divisors, whose sum is σ = 102101203992. Its totient is φ = 102101203990.

The previous prime is 102101203987. The next prime is 102101203999. The reversal of 102101203991 is 199302101201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102101203991 - 2² = 102101203987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102101203999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050601995 + 51050601996.

It is an arithmetic number, because the mean of its divisors is an integer number (51050601996).

Almost surely, 2^102101203991 is an apocalyptic number.

102101203991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101203991 is an equidigital number, since it uses as much as digits as its factorization.

102101203991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 102101203991 in words is "one hundred two billion, one hundred one million, two hundred three thousand, nine hundred ninety-one".