1231122198 has 8 divisors (see below), whose sum is σ = 2462244408. Its totient is φ = 410374064.

The previous prime is 1231122197. The next prime is 1231122247. The reversal of 1231122198 is 8912211321.

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

1231122198 is an admirable number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 102593511 + ... + 102593522.

It is an arithmetic number, because the mean of its divisors is an integer number (307780551).

Almost surely, 2^1231122198 is an apocalyptic number.

1231122198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231122198 is a wasteful number, since it uses less digits than its factorization.

1231122198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205187038.

The product of its digits is 1728, while the sum is 30.

The square root of 1231122198 is about 35087.3509686896. The cubic root of 1231122198 is about 1071.7670159705.

The spelling of 1231122198 in words is "one billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred ninety-eight".