1131021442432 has 64 divisors (see below), whose sum is σ = 2579437159200. Its totient is φ = 483905839104.

The previous prime is 1131021442379. The next prime is 1131021442451. The reversal of 1131021442432 is 2342441201311.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1131021442432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533007 + ... + 1595662.

Almost surely, 2^{1131021442432} is an apocalyptic number.

It is an amenable number.

1131021442432 is an abundant number, since it is smaller than the sum of its proper divisors (1448415716768).

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

1131021442432 is an equidigital number, since it uses as much as digits as its factorization.

1131021442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129283 (or 2129271 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1131021442432 its reverse (2342441201311), we get a palindrome (3473462643743).

The spelling of 1131021442432 in words is "one trillion, one hundred thirty-one billion, twenty-one million, four hundred forty-two thousand, four hundred thirty-two".