102120202000991 has 2 divisors, whose sum is σ = 102120202000992. Its totient is φ = 102120202000990.

The previous prime is 102120202000987. The next prime is 102120202001039. The reversal of 102120202000991 is 199000202021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102120202000991 - 2² = 102120202000987 is a prime.

It is a super-3 number, since 3×102120202000991³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102120202000951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060101000495 + 51060101000496.

It is an arithmetic number, because the mean of its divisors is an integer number (51060101000496).

Almost surely, 2^{102120202000991} is an apocalyptic number.

102120202000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120202000991 is an equidigital number, since it uses as much as digits as its factorization.

102120202000991 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 102120202000991 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, nine hundred ninety-one", and thus it is an aban number.