15240121244 has 24 divisors (see below), whose sum is σ = 27021737568. Its totient is φ = 7520071680.

The previous prime is 15240121243. The next prime is 15240121279. The reversal of 15240121244 is 44212104251.

15240121244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15240121244² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15240121243) 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 7 ways as a sum of consecutive naturals, for example, 81329 + ... + 192599.

It is an arithmetic number, because the mean of its divisors is an integer number (1125905732).

Almost surely, 2^15240121244 is an apocalyptic number.

It is an amenable number.

15240121244 is a deficient number, since it is larger than the sum of its proper divisors (11781616324).

15240121244 is a wasteful number, since it uses less digits than its factorization.

15240121244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111725 (or 111723 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 15240121244 its reverse (44212104251), we get a palindrome (59452225495).

The spelling of 15240121244 in words is "fifteen billion, two hundred forty million, one hundred twenty-one thousand, two hundred forty-four".