1220122305 has 64 divisors (see below), whose sum is σ = 2217715200. Its totient is φ = 636284160.

The previous prime is 1220122289. The next prime is 1220122313. The reversal of 1220122305 is 5032210221.

It is not a de Polignac number, because 1220122305 - 2⁴ = 1220122289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1885492 + ... + 1886138.

It is an arithmetic number, because the mean of its divisors is an integer number (34651800).

Almost surely, 2^1220122305 is an apocalyptic number.

1220122305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220122305 is a deficient number, since it is larger than the sum of its proper divisors (997592895).

1220122305 is a wasteful number, since it uses less digits than its factorization.

1220122305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1220122305 is about 34930.2491402509. The cubic root of 1220122305 is about 1068.5654356576.

Adding to 1220122305 its reverse (5032210221), we get a palindrome (6252332526).

The spelling of 1220122305 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, three hundred five".