12557485221 has 8 divisors (see below), whose sum is σ = 16749918240. Its totient is φ = 8368354512.

The previous prime is 12557485201. The next prime is 12557485231. The reversal of 12557485221 is 12258475521.

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

It is not a de Polignac number, because 12557485221 - 2¹³ = 12557477029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557485201) 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, 816690 + ... + 831923.

It is an arithmetic number, because the mean of its divisors is an integer number (2093739780).

Almost surely, 2^12557485221 is an apocalyptic number.

It is an amenable number.

12557485221 is a deficient number, since it is larger than the sum of its proper divisors (4192433019).

12557485221 is a wasteful number, since it uses less digits than its factorization.

12557485221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651155.

The product of its digits is 224000, while the sum is 42.

The spelling of 12557485221 in words is "twelve billion, five hundred fifty-seven million, four hundred eighty-five thousand, two hundred twenty-one".