1222222331 has 12 divisors (see below), whose sum is σ = 1345989792. Its totient is φ = 1108998000.

The previous prime is 1222222303. The next prime is 1222222333. The reversal of 1222222331 is 1332222221.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1222222331 is a prime.

It is a super-2 number, since 2×1222222331² = 2987654852790147122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222222333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56126 + ... + 74796.

It is an arithmetic number, because the mean of its divisors is an integer number (112165816).

Almost surely, 2^1222222331 is an apocalyptic number.

1222222331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222222331 is a deficient number, since it is larger than the sum of its proper divisors (123767461).

1222222331 is a wasteful number, since it uses less digits than its factorization.

1222222331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19234 (or 19223 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 1222222331 is about 34960.2964947381. The cubic root of 1222222331 is about 1069.1781417176.

Adding to 1222222331 its reverse (1332222221), we get a palindrome (2554444552).

The spelling of 1222222331 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, three hundred thirty-one".