91322021101 has 2 divisors, whose sum is σ = 91322021102. Its totient is φ = 91322021100.

The previous prime is 91322021099. The next prime is 91322021137. The reversal of 91322021101 is 10112022319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79034076900 + 12287944201 = 281130^2 + 110851^2 .

It is a cyclic number.

It is not a de Polignac number, because 91322021101 - 2¹ = 91322021099 is a prime.

Together with 91322021099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91322021701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45661010550 + 45661010551.

It is an arithmetic number, because the mean of its divisors is an integer number (45661010551).

Almost surely, 2^91322021101 is an apocalyptic number.

It is an amenable number.

91322021101 is a deficient number, since it is larger than the sum of its proper divisors (1).

91322021101 is an equidigital number, since it uses as much as digits as its factorization.

91322021101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 91322021101 in words is "ninety-one billion, three hundred twenty-two million, twenty-one thousand, one hundred one".