13212141520 has 40 divisors (see below), whose sum is σ = 31139040456. Its totient is φ = 5212459008.

The previous prime is 13212141487. The next prime is 13212141521. The reversal of 13212141520 is 2514121231.

It can be written as a sum of positive squares in 4 ways, for example, as 2756670016 + 10455471504 = 52504^2 + 102252^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 13212141491 and 13212141500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212141521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125337 + ... + 1137016.

Almost surely, 2^13212141520 is an apocalyptic number.

13212141520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212141520 is an abundant number, since it is smaller than the sum of its proper divisors (17926898936).

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

13212141520 is a wasteful number, since it uses less digits than its factorization.

13212141520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262439 (or 2262433 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 13212141520 its reverse (2514121231), we get a palindrome (15726262751).

The spelling of 13212141520 in words is "thirteen billion, two hundred twelve million, one hundred forty-one thousand, five hundred twenty".