1231222322112 has 112 divisors (see below), whose sum is σ = 3521739911040. Its totient is φ = 378298708992.

The previous prime is 1231222322101. The next prime is 1231222322159. The reversal of 1231222322112 is 2112232221321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4425918 + ... + 4695869.

Almost surely, 2^{1231222322112} is an apocalyptic number.

1231222322112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231222322112 is an abundant number, since it is smaller than the sum of its proper divisors (2290517588928).

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

1231222322112 is a wasteful number, since it uses less digits than its factorization.

1231222322112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121858 (or 9121848 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 1231222322112 its reverse (2112232221321), we get a palindrome (3343454543433).

The spelling of 1231222322112 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-two million, three hundred twenty-two thousand, one hundred twelve".