22122221002 has 12 divisors (see below), whose sum is σ = 38601018450. Its totient is φ = 9480951816.

The previous prime is 22122220997. The next prime is 22122221027. The reversal of 22122221002 is 20012222122.

It can be written as a sum of positive squares in only one way, i.e., 22111987401 + 10233601 = 148701^2 + 3199^2 .

It is a super-2 number, since 2×22122221002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112868377 + ... + 112868572.

Almost surely, 2^22122221002 is an apocalyptic number.

22122221002 is a deficient number, since it is larger than the sum of its proper divisors (16478797448).

22122221002 is a wasteful number, since it uses less digits than its factorization.

22122221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225736965 (or 225736958 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22122221002 its reverse (20012222122), we get a palindrome (42134443124).

The spelling of 22122221002 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, two".