1222105645 has 16 divisors (see below), whose sum is σ = 1495247040. Its totient is φ = 958624000.

The previous prime is 1222105627. The next prime is 1222105657. The reversal of 1222105645 is 5465012221.

It is not a de Polignac number, because 1222105645 - 2⁵ = 1222105613 is a prime.

It is a super-3 number, since 3×1222105645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 113130 + ... + 123460.

It is an arithmetic number, because the mean of its divisors is an integer number (93452940).

Almost surely, 2^1222105645 is an apocalyptic number.

It is an amenable number.

1222105645 is a deficient number, since it is larger than the sum of its proper divisors (273141395).

1222105645 is a wasteful number, since it uses less digits than its factorization.

1222105645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10796.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1222105645 is about 34958.6276189441. The cubic root of 1222105645 is about 1069.1441156957.

Adding to 1222105645 its reverse (5465012221), we get a palindrome (6687117866).

The spelling of 1222105645 in words is "one billion, two hundred twenty-two million, one hundred five thousand, six hundred forty-five".