1232121199 has 4 divisors (see below), whose sum is σ = 1232199864. Its totient is φ = 1232042536.

The previous prime is 1232121197. The next prime is 1232121203. The reversal of 1232121199 is 9911212321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1232121199 - 2¹ = 1232121197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1232121199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232121197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6952 + ... + 50125.

It is an arithmetic number, because the mean of its divisors is an integer number (308049966).

Almost surely, 2^1232121199 is an apocalyptic number.

1232121199 is a deficient number, since it is larger than the sum of its proper divisors (78665).

1232121199 is an equidigital number, since it uses as much as digits as its factorization.

1232121199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78664.

The product of its digits is 1944, while the sum is 31.

The square root of 1232121199 is about 35101.5839955977. The cubic root of 1232121199 is about 1072.0568347081.

The spelling of 1232121199 in words is "one billion, two hundred thirty-two million, one hundred twenty-one thousand, one hundred ninety-nine".