2221220442 has 32 divisors (see below), whose sum is σ = 5375728512. Its totient is φ = 597302784.

The previous prime is 2221220431. The next prime is 2221220447. The reversal of 2221220442 is 2440221222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2221220447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554763 + ... + 1556190.

It is an arithmetic number, because the mean of its divisors is an integer number (167991516).

Almost surely, 2^2221220442 is an apocalyptic number.

2221220442 is an abundant number, since it is smaller than the sum of its proper divisors (3154508070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221220442 is a wasteful number, since it uses less digits than its factorization.

2221220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110982.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 2221220442 is about 47129.8253975123. The cubic root of 2221220442 is about 1304.7597590673.

Adding to 2221220442 its reverse (2440221222), we get a palindrome (4661441664).

The spelling of 2221220442 in words is "two billion, two hundred twenty-one million, two hundred twenty thousand, four hundred forty-two".