22121110425 has 24 divisors (see below), whose sum is σ = 37193467680. Its totient is φ = 11597958400.

The previous prime is 22121110423. The next prime is 22121110457. The reversal of 22121110425 is 52401112122.

It is not a de Polignac number, because 22121110425 - 2¹ = 22121110423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121110421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2495136 + ... + 2503985.

It is an arithmetic number, because the mean of its divisors is an integer number (1549727820).

Almost surely, 2^22121110425 is an apocalyptic number.

22121110425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22121110425 is a deficient number, since it is larger than the sum of its proper divisors (15072357255).

22121110425 is a wasteful number, since it uses less digits than its factorization.

22121110425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999193 (or 4999188 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 22121110425 its reverse (52401112122), we get a palindrome (74522222547).

The spelling of 22121110425 in words is "twenty-two billion, one hundred twenty-one million, one hundred ten thousand, four hundred twenty-five".