121002199997 has 6 divisors (see below), whose sum is σ = 140757661278. Its totient is φ = 103716171384.

The previous prime is 121002199987. The next prime is 121002199999. The reversal of 121002199997 is 799991200121.

It can be written as a sum of positive squares in only one way, i.e., 112041495076 + 8960704921 = 334726^2 + 94661^2 .

It is not a de Polignac number, because 121002199997 - 2⁶ = 121002199933 is a prime.

It is a super-2 number, since 2×121002199997² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002199999) 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 in 5 ways as a sum of consecutive naturals, for example, 1234716278 + ... + 1234716375.

It is an arithmetic number, because the mean of its divisors is an integer number (23459610213).

Almost surely, 2^121002199997 is an apocalyptic number.

It is an amenable number.

121002199997 is a deficient number, since it is larger than the sum of its proper divisors (19755461281).

121002199997 is an equidigital number, since it uses as much as digits as its factorization.

121002199997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469432667 (or 2469432660 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 50.

The spelling of 121002199997 in words is "one hundred twenty-one billion, two million, one hundred ninety-nine thousand, nine hundred ninety-seven".