10222120991 has 2 divisors, whose sum is σ = 10222120992. Its totient is φ = 10222120990.

The previous prime is 10222120967. The next prime is 10222121053. The reversal of 10222120991 is 19902122201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10222120991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10222120921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111060495 + 5111060496.

It is an arithmetic number, because the mean of its divisors is an integer number (5111060496).

Almost surely, 2^10222120991 is an apocalyptic number.

10222120991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10222120991 is an equidigital number, since it uses as much as digits as its factorization.

10222120991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 10222120991 in words is "ten billion, two hundred twenty-two million, one hundred twenty thousand, nine hundred ninety-one".