15512201121 has 8 divisors (see below), whose sum is σ = 21582192960. Its totient is φ = 9891838352.

The previous prime is 15512201113. The next prime is 15512201149. The reversal of 15512201121 is 12110221551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15512201121 - 2³ = 15512201113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15512201101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112407186 + ... + 112407323.

It is an arithmetic number, because the mean of its divisors is an integer number (2697774120).

Almost surely, 2^15512201121 is an apocalyptic number.

It is an amenable number.

15512201121 is a deficient number, since it is larger than the sum of its proper divisors (6069991839).

15512201121 is a wasteful number, since it uses less digits than its factorization.

15512201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224814535.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 15512201121 its reverse (12110221551), we get a palindrome (27622422672).

The spelling of 15512201121 in words is "fifteen billion, five hundred twelve million, two hundred one thousand, one hundred twenty-one".