121221002199 has 16 divisors (see below), whose sum is σ = 177589964160. Its totient is φ = 72938729760.

The previous prime is 121221002197. The next prime is 121221002261. The reversal of 121221002199 is 991200122121.

It is not a de Polignac number, because 121221002199 - 2¹ = 121221002197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221002197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13208952 + ... + 13218125.

It is an arithmetic number, because the mean of its divisors is an integer number (11099372760).

Almost surely, 2^121221002199 is an apocalyptic number.

121221002199 is a deficient number, since it is larger than the sum of its proper divisors (56368961961).

121221002199 is a wasteful number, since it uses less digits than its factorization.

121221002199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26427230.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 121221002199 in words is "one hundred twenty-one billion, two hundred twenty-one million, two thousand, one hundred ninety-nine".