22121004 has 24 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 7360144.

The previous prime is 22121003. The next prime is 22121041. The reversal of 22121004 is 40012122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22121003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6847 + ... + 9545.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^22121004 is an apocalyptic number.

It is an amenable number.

22121004 is an abundant number, since it is smaller than the sum of its proper divisors (29589396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121004 is a wasteful number, since it uses less digits than its factorization.

22121004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389 (or 3387 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22121004 is about 4703.2971413680. The cubic root of 22121004 is about 280.7167182669.

Adding to 22121004 its reverse (40012122), we get a palindrome (62133126).

The spelling of 22121004 in words is "twenty-two million, one hundred twenty-one thousand, four".