22121204043 has 32 divisors (see below), whose sum is σ = 31531991040. Its totient is φ = 13754875680.

The previous prime is 22121204041. The next prime is 22121204051. The reversal of 22121204043 is 34040212122.

It is not a de Polignac number, because 22121204043 - 2¹ = 22121204041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121204041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 936646 + ... + 959972.

It is an arithmetic number, because the mean of its divisors is an integer number (985374720).

Almost surely, 2^22121204043 is an apocalyptic number.

22121204043 is a deficient number, since it is larger than the sum of its proper divisors (9410786997).

22121204043 is a wasteful number, since it uses less digits than its factorization.

22121204043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23607.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22121204043 its reverse (34040212122), we get a palindrome (56161416165).

The spelling of 22121204043 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, forty-three".