1011221425 has 6 divisors (see below), whose sum is σ = 1253914598. Its totient is φ = 808977120.

The previous prime is 1011221413. The next prime is 1011221443. The reversal of 1011221425 is 5241221101.

It can be written as a sum of positive squares in 3 ways, for example, as 4809249 + 1006412176 = 2193^2 + 31724^2 .

It is not a de Polignac number, because 1011221425 - 2⁷ = 1011221297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 20224404 + ... + 20224453.

Almost surely, 2^1011221425 is an apocalyptic number.

It is an amenable number.

1011221425 is a deficient number, since it is larger than the sum of its proper divisors (242693173).

1011221425 is an equidigital number, since it uses as much as digits as its factorization.

1011221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40448867 (or 40448862 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1011221425 is about 31799.7079389104. The cubic root of 1011221425 is about 1003.7265704222.

Adding to 1011221425 its reverse (5241221101), we get a palindrome (6252442526).

The spelling of 1011221425 in words is "one billion, eleven million, two hundred twenty-one thousand, four hundred twenty-five".