1222145105 has 8 divisors (see below), whose sum is σ = 1467609000. Its totient is φ = 977026176.

The previous prime is 1222145101. The next prime is 1222145137. The reversal of 1222145105 is 5015412221.

It can be written as a sum of positive squares in 4 ways, for example, as 75916369 + 1146228736 = 8713^2 + 33856^2 .

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 1222145105 - 2² = 1222145101 is a prime.

It is a super-2 number, since 2×1222145105² = 2987277315350922050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1222145101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78380 + ... + 92669.

It is an arithmetic number, because the mean of its divisors is an integer number (183451125).

Almost surely, 2^1222145105 is an apocalyptic number.

It is an amenable number.

1222145105 is a deficient number, since it is larger than the sum of its proper divisors (245463895).

1222145105 is a wasteful number, since it uses less digits than its factorization.

1222145105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172483.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1222145105 is about 34959.1919958113. The cubic root of 1222145105 is about 1069.1556226040.

Adding to 1222145105 its reverse (5015412221), we get a palindrome (6237557326).

The spelling of 1222145105 in words is "one billion, two hundred twenty-two million, one hundred forty-five thousand, one hundred five".