13821240120 has 32 divisors (see below), whose sum is σ = 41463720720. Its totient is φ = 3685664000.

The previous prime is 13821240119. The next prime is 13821240157. The reversal of 13821240120 is 2104212831.

It is a super-2 number, since 2×13821240120² (a number of 21 digits) contains 22 as substring.

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

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, 57588381 + ... + 57588620.

Almost surely, 2^13821240120 is an apocalyptic number.

13821240120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13821240120 is an abundant number, since it is smaller than the sum of its proper divisors (27642480600).

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

13821240120 is a wasteful number, since it uses less digits than its factorization.

13821240120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115177015 (or 115177011 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 13821240120 its reverse (2104212831), we get a palindrome (15925452951).

The spelling of 13821240120 in words is "thirteen billion, eight hundred twenty-one million, two hundred forty thousand, one hundred twenty".