13214142521 has 4 divisors (see below), whose sum is σ = 13215887232. Its totient is φ = 13212397812.

The previous prime is 13214142499. The next prime is 13214142559. The reversal of 13214142521 is 12524141231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13214142521 - 2²² = 13209948217 is a prime.

It is a super-2 number, since 2×13214142521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13214142421) 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, 860945 + ... + 876158.

It is an arithmetic number, because the mean of its divisors is an integer number (3303971808).

Almost surely, 2^13214142521 is an apocalyptic number.

It is an amenable number.

13214142521 is a deficient number, since it is larger than the sum of its proper divisors (1744711).

13214142521 is an equidigital number, since it uses as much as digits as its factorization.

13214142521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744710.

The product of its digits is 1920, while the sum is 26.

Adding to 13214142521 its reverse (12524141231), we get a palindrome (25738283752).

The spelling of 13214142521 in words is "thirteen billion, two hundred fourteen million, one hundred forty-two thousand, five hundred twenty-one".