1220222045 has 16 divisors (see below), whose sum is σ = 1674079488. Its totient is φ = 836407680.

The previous prime is 1220222041. The next prime is 1220222053. The reversal of 1220222045 is 5402220221.

It is not a de Polignac number, because 1220222045 - 2² = 1220222041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123737 + ... + 133233.

It is an arithmetic number, because the mean of its divisors is an integer number (104629968).

Almost surely, 2^1220222045 is an apocalyptic number.

It is an amenable number.

1220222045 is a deficient number, since it is larger than the sum of its proper divisors (453857443).

1220222045 is an equidigital number, since it uses as much as digits as its factorization.

1220222045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1220222045 is about 34931.6768134597. The cubic root of 1220222045 is about 1068.5945518131.

Adding to 1220222045 its reverse (5402220221), we get a palindrome (6622442266).

The spelling of 1220222045 in words is "one billion, two hundred twenty million, two hundred twenty-two thousand, forty-five".