121221102199 has 2 divisors, whose sum is σ = 121221102200. Its totient is φ = 121221102198.

The previous prime is 121221102187. The next prime is 121221102251. The reversal of 121221102199 is 991201122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221102199 - 2¹¹ = 121221100151 is a prime.

It is a super-3 number, since 3×121221102199³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121221102199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221102599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610551099 + 60610551100.

It is an arithmetic number, because the mean of its divisors is an integer number (60610551100).

Almost surely, 2^121221102199 is an apocalyptic number.

121221102199 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221102199 is an equidigital number, since it uses as much as digits as its factorization.

121221102199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 121221102199 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred ninety-nine".