1222100465 has 4 divisors (see below), whose sum is σ = 1466520564. Its totient is φ = 977680368.

The previous prime is 1222100419. The next prime is 1222100521. The reversal of 1222100465 is 5640012221.

It is a happy number.

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 790790641 + 431309824 = 28121^2 + 20768^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222100465 - 2¹⁴ = 1222084081 is a prime.

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 1222100465.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 122210042 + ... + 122210051.

It is an arithmetic number, because the mean of its divisors is an integer number (366630141).

Almost surely, 2^1222100465 is an apocalyptic number.

It is an amenable number.

1222100465 is a deficient number, since it is larger than the sum of its proper divisors (244420099).

1222100465 is an equidigital number, since it uses as much as digits as its factorization.

1222100465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244420098.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1222100465 is about 34958.5535312890. The cubic root of 1222100465 is about 1069.1426051405.

Adding to 1222100465 its reverse (5640012221), we get a palindrome (6862112686).

The spelling of 1222100465 in words is "one billion, two hundred twenty-two million, one hundred thousand, four hundred sixty-five".