1222221331 has 4 divisors (see below), whose sum is σ = 1230315664. Its totient is φ = 1214127000.

The previous prime is 1222221317. The next prime is 1222221337. The reversal of 1222221331 is 1331222221.

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 1222221331 - 2¹¹ = 1222219283 is a prime.

It is a super-2 number, since 2×1222221331² = 2987649963902823122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222221299 and 1222221308.

It is not an unprimeable number, because it can be changed into a prime (1222221337) 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, 4046940 + ... + 4047241.

It is an arithmetic number, because the mean of its divisors is an integer number (307578916).

Almost surely, 2^1222221331 is an apocalyptic number.

1222221331 is a deficient number, since it is larger than the sum of its proper divisors (8094333).

1222221331 is an equidigital number, since it uses as much as digits as its factorization.

1222221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8094332.

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

The square root of 1222221331 is about 34960.2821927970. The cubic root of 1222221331 is about 1069.1778501235.

Adding to 1222221331 its reverse (1331222221), we get a palindrome (2553443552).

The spelling of 1222221331 in words is "one billion, two hundred twenty-two million, two hundred twenty-one thousand, three hundred thirty-one".