1320433431100 has 72 divisors (see below), whose sum is σ = 3275802592160. Its totient is φ = 452564133120.

The previous prime is 1320433431059. The next prime is 1320433431127. The reversal of 1320433431100 is 11343340231.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1718566 + ... + 2365234.

Almost surely, 2^{1320433431100} is an apocalyptic number.

1320433431100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320433431100 is an abundant number, since it is smaller than the sum of its proper divisors (1955369161060).

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

1320433431100 is a wasteful number, since it uses less digits than its factorization.

1320433431100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649607 (or 649600 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1320433431100 its reverse (11343340231), we get a palindrome (1331776771331).

The spelling of 1320433431100 in words is "one trillion, three hundred twenty billion, four hundred thirty-three million, four hundred thirty-one thousand, one hundred".