11223221965 has 16 divisors (see below), whose sum is σ = 13763540736. Its totient is φ = 8782488000.

The previous prime is 11223221963. The next prime is 11223222013. The reversal of 11223221965 is 56912232211.

It is not a de Polignac number, because 11223221965 - 2¹ = 11223221963 is a prime.

It is a super-2 number, since 2×11223221965² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11223221965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223221963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23740 + ... + 151690.

It is an arithmetic number, because the mean of its divisors is an integer number (860221296).

Almost surely, 2^11223221965 is an apocalyptic number.

It is an amenable number.

11223221965 is a deficient number, since it is larger than the sum of its proper divisors (2540318771).

11223221965 is a wasteful number, since it uses less digits than its factorization.

11223221965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128340.

The product of its digits is 12960, while the sum is 34.

The spelling of 11223221965 in words is "eleven billion, two hundred twenty-three million, two hundred twenty-one thousand, nine hundred sixty-five".