1231122199 has 8 divisors (see below), whose sum is σ = 1237290912. Its totient is φ = 1224965280.

The previous prime is 1231122197. The next prime is 1231122247. The reversal of 1231122199 is 9912211321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231122199 - 2¹ = 1231122197 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 1231122199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231122197) 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, 264109 + ... + 268729.

It is an arithmetic number, because the mean of its divisors is an integer number (154661364).

Almost surely, 2^1231122199 is an apocalyptic number.

1231122199 is a deficient number, since it is larger than the sum of its proper divisors (6168713).

1231122199 is a wasteful number, since it uses less digits than its factorization.

1231122199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5897.

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

The square root of 1231122199 is about 35087.3509829397. The cubic root of 1231122199 is about 1071.7670162607.

It can be divided in two parts, 1231122 and 199, that added together give a palindrome (1231321).

The spelling of 1231122199 in words is "one billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred ninety-nine".