22221220220002 has 4 divisors (see below), whose sum is σ = 33331830330006. Its totient is φ = 11110610110000.

The previous prime is 22221220219943. The next prime is 22221220220011. The reversal of 22221220220002 is 20002202212222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21292770419281 + 928449800721 = 4614409^2 + 963561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555305054999 + ... + 5555305055002.

Almost surely, 2^{22221220220002} is an apocalyptic number.

22221220220002 is a deficient number, since it is larger than the sum of its proper divisors (11110610110004).

22221220220002 is a wasteful number, since it uses less digits than its factorization.

22221220220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110610110003.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22221220220002 its reverse (20002202212222), we get a palindrome (42223422432224).

The spelling of 22221220220002 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, two".