12221572253237 has 8 divisors (see below), whose sum is σ = 12551951972952. Its totient is φ = 11891196057600.

The previous prime is 12221572253227. The next prime is 12221572253239. The reversal of 12221572253237 is 73235227512221.

It is a happy number.

12221572253237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10616610122596 + 1604962130641 = 3258314^2 + 1266871^2 .

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 12221572253237 - 2¹² = 12221572249141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221572253239) 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, 7117037 + ... + 8665757.

It is an arithmetic number, because the mean of its divisors is an integer number (1568993996619).

Almost surely, 2^{12221572253237} is an apocalyptic number.

It is an amenable number.

12221572253237 is a deficient number, since it is larger than the sum of its proper divisors (330379719715).

12221572253237 is a wasteful number, since it uses less digits than its factorization.

12221572253237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762039.

The product of its digits is 705600, while the sum is 44.

Adding to 12221572253237 its reverse (73235227512221), we get a palindrome (85456799765458).

The spelling of 12221572253237 in words is "twelve trillion, two hundred twenty-one billion, five hundred seventy-two million, two hundred fifty-three thousand, two hundred thirty-seven".