2131321402144 has 144 divisors (see below), whose sum is σ = 4653413724960. Its totient is φ = 960139980800.

The previous prime is 2131321402139. The next prime is 2131321402159. The reversal of 2131321402144 is 4412041231312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471216267 + ... + 471220789.

It is an arithmetic number, because the mean of its divisors is an integer number (32315373090).

Almost surely, 2^{2131321402144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131321402144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2326706862480).

2131321402144 is an abundant number, since it is smaller than the sum of its proper divisors (2522092322816).

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

2131321402144 is a wasteful number, since it uses less digits than its factorization.

2131321402144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615 (or 5596 counting only the distinct ones).

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

Adding to 2131321402144 its reverse (4412041231312), we get a palindrome (6543362633456).

The spelling of 2131321402144 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-one million, four hundred two thousand, one hundred forty-four".