1321010225 has 12 divisors (see below), whose sum is σ = 1638936396. Its totient is φ = 1056238080.

The previous prime is 1321010203. The next prime is 1321010231. The reversal of 1321010225 is 5220101231.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 51940849 + 1269069376 = 7207^2 + 35624^2 .

It is not a de Polignac number, because 1321010225 - 2²⁰ = 1319961649 is a prime.

It is a Duffinian number.

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, 36569 + ... + 63081.

It is an arithmetic number, because the mean of its divisors is an integer number (136578033).

Almost surely, 2^1321010225 is an apocalyptic number.

It is an amenable number.

1321010225 is a deficient number, since it is larger than the sum of its proper divisors (317926171).

1321010225 is a wasteful number, since it uses less digits than its factorization.

1321010225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28516 (or 28511 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1321010225 is about 36345.7043541599. The cubic root of 1321010225 is about 1097.2410819905.

Adding to 1321010225 its reverse (5220101231), we get a palindrome (6541111456).

The spelling of 1321010225 in words is "one billion, three hundred twenty-one million, ten thousand, two hundred twenty-five".