1222216843 has 2 divisors, whose sum is σ = 1222216844. Its totient is φ = 1222216842.

The previous prime is 1222216837. The next prime is 1222216859. The reversal of 1222216843 is 3486122221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222216843 is a prime.

It is a super-2 number, since 2×1222216843² = 2987628022625773298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222216813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611108421 + 611108422.

It is an arithmetic number, because the mean of its divisors is an integer number (611108422).

Almost surely, 2^1222216843 is an apocalyptic number.

1222216843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222216843 is an equidigital number, since it uses as much as digits as its factorization.

1222216843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 31.

The square root of 1222216843 is about 34960.2180056132. The cubic root of 1222216843 is about 1069.1765414472.

The spelling of 1222216843 in words is "one billion, two hundred twenty-two million, two hundred sixteen thousand, eight hundred forty-three".