1321140120 has 32 divisors (see below), whose sum is σ = 3963420720. Its totient is φ = 352304000.

The previous prime is 1321140077. The next prime is 1321140131. The reversal of 1321140120 is 210411231.

It is a super-2 number, since 2×1321140120² = 3490822433347228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1321140120.

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, 5504631 + ... + 5504870.

Almost surely, 2^1321140120 is an apocalyptic number.

1321140120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321140120 is an abundant number, since it is smaller than the sum of its proper divisors (2642280600).

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

1321140120 is a wasteful number, since it uses less digits than its factorization.

1321140120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11009515 (or 11009511 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1321140120 is about 36347.4912476776. The cubic root of 1321140120 is about 1097.2770447349.

Adding to 1321140120 its reverse (210411231), we get a palindrome (1531551351).

The spelling of 1321140120 in words is "one billion, three hundred twenty-one million, one hundred forty thousand, one hundred twenty".