12521124222143 has 4 divisors (see below), whose sum is σ = 12521805959040. Its totient is φ = 12520442485248.

The previous prime is 12521124222127. The next prime is 12521124222161. The reversal of 12521124222143 is 34122242112521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12521124222143 - 2⁴ = 12521124222127 is a prime.

It is a super-2 number, since 2×12521124222143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521124222193) 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, 340840898 + ... + 340877631.

It is an arithmetic number, because the mean of its divisors is an integer number (3130451489760).

Almost surely, 2^{12521124222143} is an apocalyptic number.

12521124222143 is a deficient number, since it is larger than the sum of its proper divisors (681736897).

12521124222143 is an equidigital number, since it uses as much as digits as its factorization.

12521124222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681736896.

The product of its digits is 15360, while the sum is 32.

Adding to 12521124222143 its reverse (34122242112521), we get a palindrome (46643366334664).

The spelling of 12521124222143 in words is "twelve trillion, five hundred twenty-one billion, one hundred twenty-four million, two hundred twenty-two thousand, one hundred forty-three".