1220221225 has 12 divisors (see below), whose sum is σ = 1561884160. Its totient is φ = 944686800.

The previous prime is 1220221217. The next prime is 1220221241. The reversal of 1220221225 is 5221220221.

It is not a de Polignac number, because 1220221225 - 2³ = 1220221217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 786465 + ... + 788014.

Almost surely, 2^1220221225 is an apocalyptic number.

It is an amenable number.

1220221225 is a deficient number, since it is larger than the sum of its proper divisors (341662935).

1220221225 is a wasteful number, since it uses less digits than its factorization.

1220221225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574520 (or 1574515 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1220221225 is about 34931.6650762600. The cubic root of 1220221225 is about 1068.5943124448.

Adding to 1220221225 its reverse (5221220221), we get a palindrome (6441441446).

The spelling of 1220221225 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-five".