12122361566 has 32 divisors (see below), whose sum is σ = 21229766400. Its totient is φ = 5189303448.

The previous prime is 12122361539. The next prime is 12122361569. The reversal of 12122361566 is 66516322121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122361569) 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, 612461 + ... + 631943.

It is an arithmetic number, because the mean of its divisors is an integer number (663430200).

Almost surely, 2^12122361566 is an apocalyptic number.

12122361566 is a deficient number, since it is larger than the sum of its proper divisors (9107404834).

12122361566 is an equidigital number, since it uses as much as digits as its factorization.

12122361566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20413 (or 20399 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

Adding to 12122361566 its reverse (66516322121), we get a palindrome (78638683687).

The spelling of 12122361566 in words is "twelve billion, one hundred twenty-two million, three hundred sixty-one thousand, five hundred sixty-six".