97991010211 has 2 divisors, whose sum is σ = 97991010212. Its totient is φ = 97991010210.

The previous prime is 97991010203. The next prime is 97991010301. The reversal of 97991010211 is 11201019979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97991010211 - 2³ = 97991010203 is a prime.

It is not a weakly prime, because it can be changed into another prime (97991010011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48995505105 + 48995505106.

It is an arithmetic number, because the mean of its divisors is an integer number (48995505106).

Almost surely, 2^97991010211 is an apocalyptic number.

97991010211 is a deficient number, since it is larger than the sum of its proper divisors (1).

97991010211 is an equidigital number, since it uses as much as digits as its factorization.

97991010211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 97991010211 in words is "ninety-seven billion, nine hundred ninety-one million, ten thousand, two hundred eleven".