12222122131 has 4 divisors (see below), whose sum is σ = 12222772200. Its totient is φ = 12221472064.

The previous prime is 12222122083. The next prime is 12222122147. The reversal of 12222122131 is 13122122221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222122131 is a prime.

It is a super-2 number, since 2×12222122131² (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 = 12222122099 and 12222122108.

It is not an unprimeable number, because it can be changed into a prime (12222122431) 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, 295966 + ... + 334723.

It is an arithmetic number, because the mean of its divisors is an integer number (3055693050).

Almost surely, 2^12222122131 is an apocalyptic number.

12222122131 is a deficient number, since it is larger than the sum of its proper divisors (650069).

12222122131 is an equidigital number, since it uses as much as digits as its factorization.

12222122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650068.

The product of its digits is 192, while the sum is 19.

Adding to 12222122131 its reverse (13122122221), we get a palindrome (25344244352).

The spelling of 12222122131 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred thirty-one".