121002022091 has 2 divisors, whose sum is σ = 121002022092. Its totient is φ = 121002022090.

The previous prime is 121002022073. The next prime is 121002022093. The reversal of 121002022091 is 190220200121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121002022091 is a prime.

It is a super-2 number, since 2×121002022091² (a number of 23 digits) contains 22 as substring.

Together with 121002022093, 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 (121002022093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501011045 + 60501011046.

It is an arithmetic number, because the mean of its divisors is an integer number (60501011046).

Almost surely, 2^121002022091 is an apocalyptic number.

121002022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002022091 is an equidigital number, since it uses as much as digits as its factorization.

121002022091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 121002022091 in words is "one hundred twenty-one billion, two million, twenty-two thousand, ninety-one".