1222451121 has 16 divisors (see below), whose sum is σ = 1675110528. Its totient is φ = 792508800.

The previous prime is 1222451119. The next prime is 1222451143. The reversal of 1222451121 is 1211542221.

It is not a de Polignac number, because 1222451121 - 2¹ = 1222451119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222450121) 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 15 ways as a sum of consecutive naturals, for example, 22275 + ... + 54231.

It is an arithmetic number, because the mean of its divisors is an integer number (104694408).

Almost surely, 2^1222451121 is an apocalyptic number.

It is an amenable number.

1222451121 is a deficient number, since it is larger than the sum of its proper divisors (452659407).

1222451121 is a wasteful number, since it uses less digits than its factorization.

1222451121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32312.

The product of its digits is 320, while the sum is 21.

The square root of 1222451121 is about 34963.5684820643. The cubic root of 1222451121 is about 1069.2448513494.

Adding to 1222451121 its reverse (1211542221), we get a palindrome (2433993342).

The spelling of 1222451121 in words is "one billion, two hundred twenty-two million, four hundred fifty-one thousand, one hundred twenty-one".