1321361556140 has 48 divisors (see below), whose sum is σ = 2921838242400. Its totient is φ = 500566413312.

The previous prime is 1321361556107. The next prime is 1321361556173. The reversal of 1321361556140 is 416551631231.

It is an interprime number because it is at equal distance from previous prime (1321361556107) and next prime (1321361556173).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1321361556094 and 1321361556103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637826 + ... + 1746294.

It is an arithmetic number, because the mean of its divisors is an integer number (60871630050).

Almost surely, 2^{1321361556140} is an apocalyptic number.

1321361556140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321361556140 is an abundant number, since it is smaller than the sum of its proper divisors (1600476686260).

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

1321361556140 is a wasteful number, since it uses less digits than its factorization.

1321361556140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111634 (or 1111632 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1321361556140 in words is "one trillion, three hundred twenty-one billion, three hundred sixty-one million, five hundred fifty-six thousand, one hundred forty".