22220220121 has 32 divisors (see below), whose sum is σ = 25778995200. Its totient is φ = 18954460800.

The previous prime is 22220220091. The next prime is 22220220193. The reversal of 22220220121 is 12102202222.

It is not a de Polignac number, because 22220220121 - 2¹³ = 22220211929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220220095 and 22220220104.

It is not an unprimeable number, because it can be changed into a prime (22220220721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3524430 + ... + 3530728.

It is an arithmetic number, because the mean of its divisors is an integer number (805593600).

Almost surely, 2^22220220121 is an apocalyptic number.

It is an amenable number.

22220220121 is a deficient number, since it is larger than the sum of its proper divisors (3558775079).

22220220121 is a wasteful number, since it uses less digits than its factorization.

22220220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597.

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

Adding to 22220220121 its reverse (12102202222), we get a palindrome (34322422343).

It can be divided in two parts, 222202201 and 21, that added together give a palindrome (222202222).

The spelling of 22220220121 in words is "twenty-two billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".