12122017397 has 4 divisors (see below), whose sum is σ = 13853734176. Its totient is φ = 10390300620.

The previous prime is 12122017393. The next prime is 12122017403. The reversal of 12122017397 is 79371022121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12122017397 - 2² = 12122017393 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 (12122017393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865858379 + ... + 865858392.

It is an arithmetic number, because the mean of its divisors is an integer number (3463433544).

Almost surely, 2^12122017397 is an apocalyptic number.

It is an amenable number.

12122017397 is a deficient number, since it is larger than the sum of its proper divisors (1731716779).

12122017397 is an equidigital number, since it uses as much as digits as its factorization.

12122017397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731716778.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 12122017397 in words is "twelve billion, one hundred twenty-two million, seventeen thousand, three hundred ninety-seven".