1231442113000 has 64 divisors (see below), whose sum is σ = 3143535894720. Its totient is φ = 447797128000.

The previous prime is 1231442112917. The next prime is 1231442113009. The reversal of 1231442113000 is 3112441321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1231442113009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55963642 + ... + 55985641.

It is an arithmetic number, because the mean of its divisors is an integer number (49117748355).

Almost surely, 2^{1231442113000} is an apocalyptic number.

1231442113000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231442113000 is an abundant number, since it is smaller than the sum of its proper divisors (1912093781720).

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

1231442113000 is a wasteful number, since it uses less digits than its factorization.

1231442113000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111949315 (or 111949301 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1231442113000 its reverse (3112441321), we get a palindrome (1234554554321).

The spelling of 1231442113000 in words is "one trillion, two hundred thirty-one billion, four hundred forty-two million, one hundred thirteen thousand".