22121100010091 has 2 divisors, whose sum is σ = 22121100010092. Its totient is φ = 22121100010090.

The previous prime is 22121100010067. The next prime is 22121100010133. The reversal of 22121100010091 is 19001000112122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121100010091 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121100019091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060550005045 + 11060550005046.

It is an arithmetic number, because the mean of its divisors is an integer number (11060550005046).

Almost surely, 2^{22121100010091} is an apocalyptic number.

22121100010091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121100010091 is an equidigital number, since it uses as much as digits as its factorization.

22121100010091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 22121100010091 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, ten thousand, ninety-one".