1231122255 has 32 divisors (see below), whose sum is σ = 2151249408. Its totient is φ = 596246400.

The previous prime is 1231122247. The next prime is 1231122283. The reversal of 1231122255 is 5522211321.

It is not a de Polignac number, because 1231122255 - 2³ = 1231122247 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 166497 + ... + 173733.

It is an arithmetic number, because the mean of its divisors is an integer number (67226544).

Almost surely, 2^1231122255 is an apocalyptic number.

1231122255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231122255 is a deficient number, since it is larger than the sum of its proper divisors (920127153).

1231122255 is a wasteful number, since it uses less digits than its factorization.

1231122255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8287.

The product of its digits is 1200, while the sum is 24.

The square root of 1231122255 is about 35087.3517809481. The cubic root of 1231122255 is about 1071.7670325112.

Adding to 1231122255 its reverse (5522211321), we get a palindrome (6753333576).

The spelling of 1231122255 in words is "one billion, two hundred thirty-one million, one hundred twenty-two thousand, two hundred fifty-five".