22010121 has 24 divisors (see below), whose sum is σ = 38473344. Its totient is φ = 11836800.

The previous prime is 22010117. The next prime is 22010123. The reversal of 22010121 is 12101022.

It is not a de Polignac number, because 22010121 - 2² = 22010117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (22010123) 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 23 ways as a sum of consecutive naturals, for example, 9205 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (1603056).

Almost surely, 2^22010121 is an apocalyptic number.

22010121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22010121 is a deficient number, since it is larger than the sum of its proper divisors (16463223).

22010121 is a wasteful number, since it uses less digits than its factorization.

22010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20581 (or 20578 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22010121 is about 4691.4945379911. The cubic root of 22010121 is about 280.2468953266.

Adding to 22010121 its reverse (12101022), we get a palindrome (34111143).

Subtracting from 22010121 its reverse (12101022), we obtain a palindrome (9909099).

The spelling of 22010121 in words is "twenty-two million, ten thousand, one hundred twenty-one".