121000012199 has 4 divisors (see below), whose sum is σ = 132000013320. Its totient is φ = 110000011080.

The previous prime is 121000012193. The next prime is 121000012201. The reversal of 121000012199 is 991210000121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991210000121 = 11 ⋅90110000011.

It is a cyclic number.

It is not a de Polignac number, because 121000012199 - 2⁸ = 121000011943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000012193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500000544 + ... + 5500000565.

It is an arithmetic number, because the mean of its divisors is an integer number (33000003330).

Almost surely, 2^121000012199 is an apocalyptic number.

121000012199 is a deficient number, since it is larger than the sum of its proper divisors (11000001121).

121000012199 is a wasteful number, since it uses less digits than its factorization.

121000012199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000001120.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 121000012199 in words is "one hundred twenty-one billion, twelve thousand, one hundred ninety-nine".