15112311421 has 4 divisors (see below), whose sum is σ = 15205025152. Its totient is φ = 15019597692.

The previous prime is 15112311407. The next prime is 15112311443. The reversal of 15112311421 is 12411321151.

15112311421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15112311421 - 2¹⁹ = 15111787133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15112311392 and 15112311401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15112311821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46356621 + ... + 46356946.

It is an arithmetic number, because the mean of its divisors is an integer number (3801256288).

Almost surely, 2^15112311421 is an apocalyptic number.

It is an amenable number.

15112311421 is a deficient number, since it is larger than the sum of its proper divisors (92713731).

15112311421 is an equidigital number, since it uses as much as digits as its factorization.

15112311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92713730.

The product of its digits is 240, while the sum is 22.

Adding to 15112311421 its reverse (12411321151), we get a palindrome (27523632572).

The spelling of 15112311421 in words is "fifteen billion, one hundred twelve million, three hundred eleven thousand, four hundred twenty-one".