21122365145 has 8 divisors (see below), whose sum is σ = 28967815104. Its totient is φ = 14483907504.

The previous prime is 21122365133. The next prime is 21122365211. The reversal of 21122365145 is 54156322112.

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 21122365145 - 2¹² = 21122361049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301748039 + ... + 301748108.

It is an arithmetic number, because the mean of its divisors is an integer number (3620976888).

Almost surely, 2^21122365145 is an apocalyptic number.

It is an amenable number.

21122365145 is a deficient number, since it is larger than the sum of its proper divisors (7845449959).

21122365145 is an equidigital number, since it uses as much as digits as its factorization.

21122365145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603496159.

The product of its digits is 14400, while the sum is 32.

Adding to 21122365145 its reverse (54156322112), we get a palindrome (75278687257).

The spelling of 21122365145 in words is "twenty-one billion, one hundred twenty-two million, three hundred sixty-five thousand, one hundred forty-five".