12222731 has 2 divisors, whose sum is σ = 12222732. Its totient is φ = 12222730.

The previous prime is 12222713. The next prime is 12222733. The reversal of 12222731 is 13722221.

Together with previous prime (12222713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12222731 - 2⁶ = 12222667 is a prime.

It is a super-2 number, since 2×12222731² = 298790306196722, which contains 22 as substring.

Together with 12222733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12222733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111365 + 6111366.

It is an arithmetic number, because the mean of its divisors is an integer number (6111366).

Almost surely, 2^12222731 is an apocalyptic number.

12222731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222731 is an equidigital number, since it uses as much as digits as its factorization.

12222731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 12222731 is about 3496.1022582299. The cubic root of 12222731 is about 230.3506372013.

Adding to 12222731 its reverse (13722221), we get a palindrome (25944952).

The spelling of 12222731 in words is "twelve million, two hundred twenty-two thousand, seven hundred thirty-one".