121002198997 has 2 divisors, whose sum is σ = 121002198998. Its totient is φ = 121002198996.

The previous prime is 121002198983. The next prime is 121002199091. The reversal of 121002198997 is 799891200121.

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., 119445580881 + 1556618116 = 345609^2 + 39454^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002198997 - 2³¹ = 118854715349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121002198997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002198697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501099498 + 60501099499.

It is an arithmetic number, because the mean of its divisors is an integer number (60501099499).

Almost surely, 2^121002198997 is an apocalyptic number.

It is an amenable number.

121002198997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002198997 is an equidigital number, since it uses as much as digits as its factorization.

121002198997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 121002198997 in words is "one hundred twenty-one billion, two million, one hundred ninety-eight thousand, nine hundred ninety-seven".