210202011000991 has 2 divisors, whose sum is σ = 210202011000992. Its totient is φ = 210202011000990.

The previous prime is 210202011000973. The next prime is 210202011001019. The reversal of 210202011000991 is 199000110202012.

It is an a-pointer prime, because the next prime (210202011001019) can be obtained adding 210202011000991 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210202011000991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210202011004991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105101005500495 + 105101005500496.

It is an arithmetic number, because the mean of its divisors is an integer number (105101005500496).

Almost surely, 2^{210202011000991} is an apocalyptic number.

210202011000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

210202011000991 is an equidigital number, since it uses as much as digits as its factorization.

210202011000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 210202011000991 in words is "two hundred ten trillion, two hundred two billion, eleven million, nine hundred ninety-one", and thus it is an aban number.