1123128031300 has 72 divisors (see below), whose sum is σ = 2658967627680. Its totient is φ = 408376819200.

The previous prime is 1123128031271. The next prime is 1123128031307. The reversal of 1123128031300 is 31308213211.

It is a happy number.

It is a super-2 number, since 2×1123128031300² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1123128031307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16352431 + ... + 16420969.

It is an arithmetic number, because the mean of its divisors is an integer number (36930105940).

Almost surely, 2^{1123128031300} is an apocalyptic number.

1123128031300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123128031300 is an abundant number, since it is smaller than the sum of its proper divisors (1535839596380).

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

1123128031300 is a wasteful number, since it uses less digits than its factorization.

1123128031300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83461 (or 83454 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 1123128031300 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-eight million, thirty-one thousand, three hundred".