1321612005240 has 96 divisors (see below), whose sum is σ = 4295422872000. Its totient is φ = 352414782720.

The previous prime is 1321612005227. The next prime is 1321612005283. The reversal of 1321612005240 is 425002161231.

1321612005240 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 612 + 0 + 0 + 5 + 2 + 40 = 666.

It is a congruent 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, 10213345 + ... + 10341935.

It is an arithmetic number, because the mean of its divisors is an integer number (44743988250).

Almost surely, 2^{1321612005240} is an apocalyptic number.

1321612005240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321612005240 is an abundant number, since it is smaller than the sum of its proper divisors (2973810866760).

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

1321612005240 is a wasteful number, since it uses less digits than its factorization.

1321612005240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157157 (or 157150 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1321612005240 its reverse (425002161231), we get a palindrome (1746614166471).

The spelling of 1321612005240 in words is "one trillion, three hundred twenty-one billion, six hundred twelve million, five thousand, two hundred forty".