15201231666012 has 72 divisors (see below), whose sum is σ = 43918677129600. Its totient is φ = 4342812664608.

The previous prime is 15201231666011. The next prime is 15201231666029. The reversal of 15201231666012 is 21066613210251.

15201231666012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15201231666011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19539 + ... + 5513877.

It is an arithmetic number, because the mean of its divisors is an integer number (609981626800).

Almost surely, 2^{15201231666012} is an apocalyptic number.

15201231666012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15201231666012 is an abundant number, since it is smaller than the sum of its proper divisors (28717445463588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15201231666012 is a wasteful number, since it uses less digits than its factorization.

15201231666012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5505335 (or 5505330 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 15201231666012 its reverse (21066613210251), we get a palindrome (36267844876263).

The spelling of 15201231666012 in words is "fifteen trillion, two hundred one billion, two hundred thirty-one million, six hundred sixty-six thousand, twelve".