13121205432 has 64 divisors (see below), whose sum is σ = 33541248000. Its totient is φ = 4276381824.

The previous prime is 13121205431. The next prime is 13121205443. The reversal of 13121205432 is 23450212131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121205431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161694 + ... + 228882.

It is an arithmetic number, because the mean of its divisors is an integer number (524082000).

Almost surely, 2^13121205432 is an apocalyptic number.

13121205432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121205432 is an abundant number, since it is smaller than the sum of its proper divisors (20420042568).

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

13121205432 is a wasteful number, since it uses less digits than its factorization.

13121205432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67380 (or 67376 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 13121205432 its reverse (23450212131), we get a palindrome (36571417563).

The spelling of 13121205432 in words is "thirteen billion, one hundred twenty-one million, two hundred five thousand, four hundred thirty-two".