20121230199 has 12 divisors (see below), whose sum is σ = 31208438904. Its totient is φ = 11497845744.

The previous prime is 20121230191. The next prime is 20121230203. The reversal of 20121230199 is 99103212102.

It is not a de Polignac number, because 20121230199 - 2³ = 20121230191 is a prime.

It is a super-2 number, since 2×20121230199² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121230191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68439412 + ... + 68439705.

It is an arithmetic number, because the mean of its divisors is an integer number (2600703242).

Almost surely, 2^20121230199 is an apocalyptic number.

20121230199 is a deficient number, since it is larger than the sum of its proper divisors (11087208705).

20121230199 is a wasteful number, since it uses less digits than its factorization.

20121230199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136879134 (or 136879127 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 20121230199 in words is "twenty billion, one hundred twenty-one million, two hundred thirty thousand, one hundred ninety-nine".