1231112122200 has 288 divisors, whose sum is σ = 4248931168560. Its totient is φ = 319220352000.

The previous prime is 1231112122183. The next prime is 1231112122241. The reversal of 1231112122200 is 22212111321.

1231112122200 is a `hidden beast` number, since 1 + 231 + 1 + 1 + 212 + 220 + 0 = 666.

It is a super-3 number, since 3×1231112122200³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 124337250 + ... + 124347150.

Almost surely, 2^{1231112122200} is an apocalyptic number.

1231112122200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231112122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124465584280).

1231112122200 is an abundant number, since it is smaller than the sum of its proper divisors (3017819046360).

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

1231112122200 is a wasteful number, since it uses less digits than its factorization.

1231112122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11827 (or 11815 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1231112122200 its reverse (22212111321), we get a palindrome (1253324233521).

It can be divided in two parts, 12311121 and 22200, that added together give a palindrome (12333321).

The spelling of 1231112122200 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred twenty-two thousand, two hundred".