21325222145 has 8 divisors (see below), whose sum is σ = 25791765504. Its totient is φ = 16925845104.

The previous prime is 21325222141. The next prime is 21325222151. The reversal of 21325222145 is 54122252312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21325222145 - 2² = 21325222141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325222141) 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, 16790879 + ... + 16792148.

It is an arithmetic number, because the mean of its divisors is an integer number (3223970688).

Almost surely, 2^21325222145 is an apocalyptic number.

It is an amenable number.

21325222145 is a deficient number, since it is larger than the sum of its proper divisors (4466543359).

21325222145 is a wasteful number, since it uses less digits than its factorization.

21325222145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33583159.

The product of its digits is 9600, while the sum is 29.

Adding to 21325222145 its reverse (54122252312), we get a palindrome (75447474457).

The spelling of 21325222145 in words is "twenty-one billion, three hundred twenty-five million, two hundred twenty-two thousand, one hundred forty-five".