1321240000432 has 20 divisors (see below), whose sum is σ = 2792620910376. Its totient is φ = 600563636480.

The previous prime is 1321240000427. The next prime is 1321240000433. The reversal of 1321240000432 is 2340000421231.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1321240000433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3753522553 + ... + 3753522904.

Almost surely, 2^{1321240000432} is an apocalyptic number.

It is an amenable number.

1321240000432 is an abundant number, since it is smaller than the sum of its proper divisors (1471380909944).

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

1321240000432 is a wasteful number, since it uses less digits than its factorization.

1321240000432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507045476 (or 7507045470 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1321240000432 its reverse (2340000421231), we get a palindrome (3661240421663).

The spelling of 1321240000432 in words is "one trillion, three hundred twenty-one billion, two hundred forty million, four hundred thirty-two", and thus it is an aban number.