1123412031200 has 72 divisors (see below), whose sum is σ = 2746079036568. Its totient is φ = 448783239680.

The previous prime is 1123412031191. The next prime is 1123412031253. The reversal of 1123412031200 is 21302143211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289922 + ... + 1526721.

It is an arithmetic number, because the mean of its divisors is an integer number (38139986619).

Almost surely, 2^{1123412031200} is an apocalyptic number.

1123412031200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123412031200 is an abundant number, since it is smaller than the sum of its proper divisors (1622667005368).

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

1123412031200 is a wasteful number, since it uses less digits than its factorization.

1123412031200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817436 (or 1817423 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1123412031200 its reverse (21302143211), we get a palindrome (1144714174411).

The spelling of 1123412031200 in words is "one trillion, one hundred twenty-three billion, four hundred twelve million, thirty-one thousand, two hundred".