91030210001 has 2 divisors, whose sum is σ = 91030210002. Its totient is φ = 91030210000.

The previous prime is 91030209973. The next prime is 91030210003. The reversal of 91030210001 is 10001203019.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89054496400 + 1975713601 = 298420^2 + 44449^2 .

It is an emirp because it is prime and its reverse (10001203019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91030210001 - 2⁶ = 91030209937 is a prime.

Together with 91030210003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91030210003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45515105000 + 45515105001.

It is an arithmetic number, because the mean of its divisors is an integer number (45515105001).

Almost surely, 2^91030210001 is an apocalyptic number.

It is an amenable number.

91030210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91030210001 is an equidigital number, since it uses as much as digits as its factorization.

91030210001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 91030210001 in words is "ninety-one billion, thirty million, two hundred ten thousand, one".