2221221242 has 16 divisors (see below), whose sum is σ = 3373211520. Its totient is φ = 1096902768.

The previous prime is 2221221229. The next prime is 2221221253. The reversal of 2221221242 is 2421221222.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31259 + ... + 73617.

It is an arithmetic number, because the mean of its divisors is an integer number (210825720).

Almost surely, 2^2221221242 is an apocalyptic number.

2221221242 is a deficient number, since it is larger than the sum of its proper divisors (1151990278).

2221221242 is a wasteful number, since it uses less digits than its factorization.

2221221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42685.

The product of its digits is 512, while the sum is 20.

The square root of 2221221242 is about 47129.8338847062. The cubic root of 2221221242 is about 1304.7599157091.

Subtracting from 2221221242 its sum of digits (20), we obtain a palindrome (2221221222).

Adding to 2221221242 its reverse (2421221222), we get a palindrome (4642442464).

The spelling of 2221221242 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-two".