12122400331 has 4 divisors (see below), whose sum is σ = 12127332600. Its totient is φ = 12117468064.

The previous prime is 12122400313. The next prime is 12122400359. The reversal of 12122400331 is 13300422121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12122400331 - 2⁹ = 12122399819 is a prime.

It is a super-2 number, since 2×12122400331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122400299 and 12122400308.

It is not an unprimeable number, because it can be changed into a prime (12122400431) 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, 2462446 + ... + 2467363.

It is an arithmetic number, because the mean of its divisors is an integer number (3031833150).

Almost surely, 2^12122400331 is an apocalyptic number.

12122400331 is a deficient number, since it is larger than the sum of its proper divisors (4932269).

12122400331 is an equidigital number, since it uses as much as digits as its factorization.

12122400331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932268.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12122400331 its reverse (13300422121), we get a palindrome (25422822452).

The spelling of 12122400331 in words is "twelve billion, one hundred twenty-two million, four hundred thousand, three hundred thirty-one".