22001216245 has 4 divisors (see below), whose sum is σ = 26401459500. Its totient is φ = 17600972992.

The previous prime is 22001216239. The next prime is 22001216249. The reversal of 22001216245 is 54261210022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16769732004 + 5231484241 = 129498^2 + 72329^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001216245 - 2¹⁷ = 22001085173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001216249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200121620 + ... + 2200121629.

It is an arithmetic number, because the mean of its divisors is an integer number (6600364875).

Almost surely, 2^22001216245 is an apocalyptic number.

It is an amenable number.

22001216245 is a deficient number, since it is larger than the sum of its proper divisors (4400243255).

22001216245 is an equidigital number, since it uses as much as digits as its factorization.

22001216245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400243254.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22001216245 its reverse (54261210022), we get a palindrome (76262426267).

The spelling of 22001216245 in words is "twenty-two billion, one million, two hundred sixteen thousand, two hundred forty-five".