22222121026 has 24 divisors (see below), whose sum is σ = 39411005436. Its totient is φ = 9367636320.

The previous prime is 22222120997. The next prime is 22222121027. The reversal of 22222121026 is 62012122222.

It can be written as a sum of positive squares in 2 ways, for example, as 21949904025 + 272217001 = 148155^2 + 16499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22222120988 and 22222121006.

It is not an unprimeable number, because it can be changed into a prime (22222121027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1852681 + ... + 1864636.

Almost surely, 2^22222121026 is an apocalyptic number.

22222121026 is a deficient number, since it is larger than the sum of its proper divisors (17188884410).

22222121026 is a wasteful number, since it uses less digits than its factorization.

22222121026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717394 (or 3717387 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 22222121026 its reverse (62012122222), we get a palindrome (84234243248).

The spelling of 22222121026 in words is "twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-six".