15221235235412 has 12 divisors (see below), whose sum is σ = 26697290698176. Its totient is φ = 7593437893080.

The previous prime is 15221235235361. The next prime is 15221235235439. The reversal of 15221235235412 is 21453253212251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4294929164 + ... + 4294932707.

It is an arithmetic number, because the mean of its divisors is an integer number (2224774224848).

Almost surely, 2^{15221235235412} is an apocalyptic number.

It is an amenable number.

15221235235412 is a deficient number, since it is larger than the sum of its proper divisors (11476055462764).

15221235235412 is a wasteful number, since it uses less digits than its factorization.

15221235235412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589862318 (or 8589862316 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

Adding to 15221235235412 its reverse (21453253212251), we get a palindrome (36674488447663).

The spelling of 15221235235412 in words is "fifteen trillion, two hundred twenty-one billion, two hundred thirty-five million, two hundred thirty-five thousand, four hundred twelve".