10142431211521 has 4 divisors (see below), whose sum is σ = 11591349956032. Its totient is φ = 8693512467012.

The previous prime is 10142431211453. The next prime is 10142431211527. The reversal of 10142431211521 is 12511213424101.

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 10142431211521 - 2¹⁵ = 10142431178753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10142431211521.

It is not an unprimeable number, because it can be changed into a prime (10142431211527) 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, 724459372245 + ... + 724459372258.

It is an arithmetic number, because the mean of its divisors is an integer number (2897837489008).

Almost surely, 2^{10142431211521} is an apocalyptic number.

It is an amenable number.

10142431211521 is a deficient number, since it is larger than the sum of its proper divisors (1448918744511).

10142431211521 is an equidigital number, since it uses as much as digits as its factorization.

10142431211521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448918744510.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 10142431211521 its reverse (12511213424101), we get a palindrome (22653644635622).

The spelling of 10142431211521 in words is "ten trillion, one hundred forty-two billion, four hundred thirty-one million, two hundred eleven thousand, five hundred twenty-one".