22000121 has 16 divisors (see below), whose sum is σ = 26974080. Its totient is φ = 17656320.

The previous prime is 22000109. The next prime is 22000127. The reversal of 22000121 is 12100022.

It is not a de Polignac number, because 22000121 - 2¹⁰ = 21999097 is a prime.

It is a Duffinian number.

22000121 is a modest number, since divided by 121 gives 22 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 22000099 and 22000108.

It is not an unprimeable number, because it can be changed into a prime (22000127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (1685880).

Almost surely, 2^22000121 is an apocalyptic number.

It is an amenable number.

22000121 is a deficient number, since it is larger than the sum of its proper divisors (4973959).

22000121 is a wasteful number, since it uses less digits than its factorization.

22000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 22000121 is about 4690.4286584490. The cubic root of 22000121 is about 280.2044467718.

Adding to 22000121 its reverse (12100022), we get a palindrome (34100143).

Subtracting from 22000121 its reverse (12100022), we obtain a palindrome (9900099).

It can be divided in two parts, 220001 and 21, that added together give a palindrome (220022).

The spelling of 22000121 in words is "twenty-two million, one hundred twenty-one", and thus it is an aban number.