22101666491 has 2 divisors, whose sum is σ = 22101666492. Its totient is φ = 22101666490.

The previous prime is 22101666451. The next prime is 22101666553. The reversal of 22101666491 is 19466610122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22101666491 - 2²⁶ = 22034557627 is a prime.

It is not a weakly prime, because it can be changed into another prime (22101666451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050833245 + 11050833246.

It is an arithmetic number, because the mean of its divisors is an integer number (11050833246).

Almost surely, 2^22101666491 is an apocalyptic number.

22101666491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101666491 is an equidigital number, since it uses as much as digits as its factorization.

22101666491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 22101666491 in words is "twenty-two billion, one hundred one million, six hundred sixty-six thousand, four hundred ninety-one".