1222531109 has 2 divisors, whose sum is σ = 1222531110. Its totient is φ = 1222531108.

The previous prime is 1222531087. The next prime is 1222531129. The reversal of 1222531109 is 9011352221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1204298209 + 18232900 = 34703^2 + 4270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222531109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222531129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611265554 + 611265555.

It is an arithmetic number, because the mean of its divisors is an integer number (611265555).

Almost surely, 2^1222531109 is an apocalyptic number.

It is an amenable number.

1222531109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222531109 is an equidigital number, since it uses as much as digits as its factorization.

1222531109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1222531109 is about 34964.7123397290. The cubic root of 1222531109 is about 1069.2681719524.

It can be divided in two parts, 12225 and 31109, that added together give a palindrome (43334).

The spelling of 1222531109 in words is "one billion, two hundred twenty-two million, five hundred thirty-one thousand, one hundred nine".