121002221117 has 2 divisors, whose sum is σ = 121002221118. Its totient is φ = 121002221116.

The previous prime is 121002221099. The next prime is 121002221143. The reversal of 121002221117 is 711122200121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118147563076 + 2854658041 = 343726^2 + 53429^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002221117 - 2²⁸ = 120733785661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002221147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501110558 + 60501110559.

It is an arithmetic number, because the mean of its divisors is an integer number (60501110559).

Almost surely, 2^121002221117 is an apocalyptic number.

It is an amenable number.

121002221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002221117 is an equidigital number, since it uses as much as digits as its factorization.

121002221117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 121002221117 its reverse (711122200121), we get a palindrome (832124421238).

The spelling of 121002221117 in words is "one hundred twenty-one billion, two million, two hundred twenty-one thousand, one hundred seventeen".