2221320242 has 4 divisors (see below), whose sum is σ = 3331980366. Its totient is φ = 1110660120.

The previous prime is 2221320223. The next prime is 2221320247. The reversal of 2221320242 is 2420231222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2420231222 = 2 ⋅1210115611.

It can be written as a sum of positive squares in only one way, i.e., 1221432601 + 999887641 = 34949^2 + 31621^2 .

It is not an unprimeable number, because it can be changed into a prime (2221320247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555330059 + ... + 555330062.

Almost surely, 2^2221320242 is an apocalyptic number.

2221320242 is a deficient number, since it is larger than the sum of its proper divisors (1110660124).

2221320242 is a wasteful number, since it uses less digits than its factorization.

2221320242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110660123.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2221320242 is about 47130.8841631472. The cubic root of 2221320242 is about 1304.7792998374.

Adding to 2221320242 its reverse (2420231222), we get a palindrome (4641551464).

The spelling of 2221320242 in words is "two billion, two hundred twenty-one million, three hundred twenty thousand, two hundred forty-two".