1221122441 has 12 divisors (see below), whose sum is σ = 1533973056. Its totient is φ = 951523320.

The previous prime is 1221122389. The next prime is 1221122447. The reversal of 1221122441 is 1442211221.

It is not a de Polignac number, because 1221122441 - 2³⁰ = 147380617 is a prime.

It is a super-2 number, since 2×1221122441² = 2982280031827596962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221122447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720005 + ... + 721698.

It is an arithmetic number, because the mean of its divisors is an integer number (127831088).

Almost surely, 2^1221122441 is an apocalyptic number.

1221122441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221122441 is a deficient number, since it is larger than the sum of its proper divisors (312850615).

1221122441 is a wasteful number, since it uses less digits than its factorization.

1221122441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441732 (or 1441721 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1221122441 is about 34944.5623953141. The cubic root of 1221122441 is about 1068.8573241240.

Adding to 1221122441 its reverse (1442211221), we get a palindrome (2663333662).

The spelling of 1221122441 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, four hundred forty-one".