1212121112199 has 8 divisors (see below), whose sum is σ = 1671891189360. Its totient is φ = 780215888256.

The previous prime is 1212121112179. The next prime is 1212121112201. The reversal of 1212121112199 is 9912111212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212121112199 - 2¹⁹ = 1212120587911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212121112119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6966213202 + ... + 6966213375.

It is an arithmetic number, because the mean of its divisors is an integer number (208986398670).

Almost surely, 2^{1212121112199} is an apocalyptic number.

1212121112199 is a deficient number, since it is larger than the sum of its proper divisors (459770077161).

1212121112199 is a wasteful number, since it uses less digits than its factorization.

1212121112199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13932426609.

The product of its digits is 1296, while the sum is 33.

The spelling of 1212121112199 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, one hundred ninety-nine".