2221421345 has 24 divisors (see below), whose sum is σ = 3148958592. Its totient is φ = 1491297600.

The previous prime is 2221421333. The next prime is 2221421359. The reversal of 2221421345 is 5431241222.

It is not a de Polignac number, because 2221421345 - 2⁸ = 2221421089 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 110201 + ... + 128790.

It is an arithmetic number, because the mean of its divisors is an integer number (131206608).

Almost surely, 2^2221421345 is an apocalyptic number.

It is an amenable number.

2221421345 is a deficient number, since it is larger than the sum of its proper divisors (927537247).

2221421345 is a wasteful number, since it uses less digits than its factorization.

2221421345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239033 (or 239020 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 2221421345 is about 47131.9567278932. The cubic root of 2221421345 is about 1304.7990951372.

Adding to 2221421345 its reverse (5431241222), we get a palindrome (7652662567).

The spelling of 2221421345 in words is "two billion, two hundred twenty-one million, four hundred twenty-one thousand, three hundred forty-five".