12122311005 has 96 divisors (see below), whose sum is σ = 24437946624. Its totient is φ = 5444195328.

The previous prime is 12122311001. The next prime is 12122311007. The reversal of 12122311005 is 50011322121.

It is not a de Polignac number, because 12122311005 - 2² = 12122311001 is a prime.

It is a super-2 number, since 2×12122311005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122311001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12936897 + ... + 12937833.

It is an arithmetic number, because the mean of its divisors is an integer number (254561944).

Almost surely, 2^12122311005 is an apocalyptic number.

12122311005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12122311005 is an abundant number, since it is smaller than the sum of its proper divisors (12315635619).

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

12122311005 is a wasteful number, since it uses less digits than its factorization.

12122311005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 12122311005 its reverse (50011322121), we get a palindrome (62133633126).

The spelling of 12122311005 in words is "twelve billion, one hundred twenty-two million, three hundred eleven thousand, five".