1210121022091 has 2 divisors, whose sum is σ = 1210121022092. Its totient is φ = 1210121022090.

The previous prime is 1210121021999. The next prime is 1210121022139. The reversal of 1210121022091 is 1902201210121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1210121022091 - 2²⁷ = 1209986804363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210121022191) 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, 605060511045 + 605060511046.

It is an arithmetic number, because the mean of its divisors is an integer number (605060511046).

Almost surely, 2^{1210121022091} is an apocalyptic number.

1210121022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210121022091 is an equidigital number, since it uses as much as digits as its factorization.

1210121022091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1210121022091 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, twenty-two thousand, ninety-one".