2221221123 has 40 divisors (see below), whose sum is σ = 3627909120. Its totient is φ = 1343167920.

The previous prime is 2221221103. The next prime is 2221221127. The reversal of 2221221123 is 3211221222.

It is not a de Polignac number, because 2221221123 - 2⁵ = 2221221091 is a prime.

It is a super-2 number, since 2×2221221123² = 9867646554522762258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221221096 and 2221221105.

It is not an unprimeable number, because it can be changed into a prime (2221221127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 431358 + ... + 436476.

It is an arithmetic number, because the mean of its divisors is an integer number (90697728).

Almost surely, 2^2221221123 is an apocalyptic number.

2221221123 is a deficient number, since it is larger than the sum of its proper divisors (1406687997).

2221221123 is a wasteful number, since it uses less digits than its factorization.

2221221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5629 (or 5620 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2221221123 is about 47129.8326222362. The cubic root of 2221221123 is about 1304.7598924086.

Adding to 2221221123 its reverse (3211221222), we get a palindrome (5432442345).

Subtracting 2221221123 from its reverse (3211221222), we obtain a palindrome (990000099).

The spelling of 2221221123 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".