1210220225 has 24 divisors (see below), whose sum is σ = 1592049888. Its totient is φ = 909446400.

The previous prime is 1210220159. The next prime is 1210220227. The reversal of 1210220225 is 5220220121.

It is not a de Polignac number, because 1210220225 - 2¹⁰ = 1210219201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210220227) 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 23 ways as a sum of consecutive naturals, for example, 240182 + ... + 245168.

It is an arithmetic number, because the mean of its divisors is an integer number (66335412).

Almost surely, 2^1210220225 is an apocalyptic number.

It is an amenable number.

1210220225 is a deficient number, since it is larger than the sum of its proper divisors (381829663).

1210220225 is a wasteful number, since it uses less digits than its factorization.

1210220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5585 (or 5580 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1210220225 is about 34788.2196296390. The cubic root of 1210220225 is about 1065.6668808484. Note that the first 3 decimals are identical.

Adding to 1210220225 its reverse (5220220121), we get a palindrome (6430440346).

The spelling of 1210220225 in words is "one billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-five".