102201030991 has 2 divisors, whose sum is σ = 102201030992. Its totient is φ = 102201030990.

The previous prime is 102201030983. The next prime is 102201031003. The reversal of 102201030991 is 199030102201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102201030991 - 2³ = 102201030983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102201030931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51100515495 + 51100515496.

It is an arithmetic number, because the mean of its divisors is an integer number (51100515496).

Almost surely, 2^102201030991 is an apocalyptic number.

102201030991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102201030991 is an equidigital number, since it uses as much as digits as its factorization.

102201030991 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 28.

The spelling of 102201030991 in words is "one hundred two billion, two hundred one million, thirty thousand, nine hundred ninety-one".