1222441561 has 4 divisors (see below), whose sum is σ = 1333572624. Its totient is φ = 1111310500.

The previous prime is 1222441543. The next prime is 1222441567. The reversal of 1222441561 is 1651442221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222441561 - 2⁵ = 1222441529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222441567) 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 3 ways as a sum of consecutive naturals, for example, 55565515 + ... + 55565536.

It is an arithmetic number, because the mean of its divisors is an integer number (333393156).

Almost surely, 2^1222441561 is an apocalyptic number.

1222441561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222441561 is a deficient number, since it is larger than the sum of its proper divisors (111131063).

1222441561 is a wasteful number, since it uses less digits than its factorization.

1222441561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111131062.

The product of its digits is 3840, while the sum is 28.

The square root of 1222441561 is about 34963.4317680630. The cubic root of 1222441561 is about 1069.2420640512.

Adding to 1222441561 its reverse (1651442221), we get a palindrome (2873883782).

The spelling of 1222441561 in words is "one billion, two hundred twenty-two million, four hundred forty-one thousand, five hundred sixty-one".