15631104121 has 16 divisors (see below), whose sum is σ = 16629753600. Its totient is φ = 14641378560.

The previous prime is 15631104113. The next prime is 15631104127. The reversal of 15631104121 is 12140113651.

It is a cyclic number.

It is not a de Polignac number, because 15631104121 - 2³ = 15631104113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15631104127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7826295 + ... + 7828291.

It is an arithmetic number, because the mean of its divisors is an integer number (1039359600).

Almost surely, 2^15631104121 is an apocalyptic number.

It is an amenable number.

15631104121 is a deficient number, since it is larger than the sum of its proper divisors (998649479).

15631104121 is a wasteful number, since it uses less digits than its factorization.

15631104121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 15631104121 its reverse (12140113651), we get a palindrome (27771217772).

The spelling of 15631104121 in words is "fifteen billion, six hundred thirty-one million, one hundred four thousand, one hundred twenty-one".