1001211025 has 6 divisors (see below), whose sum is σ = 1241501702. Its totient is φ = 800968800.

The previous prime is 1001211017. The next prime is 1001211047. The reversal of 1001211025 is 5201121001.

1001211025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 278622864 + 722588161 = 16692^2 + 26881^2 .

It is not a de Polignac number, because 1001211025 - 2³ = 1001211017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001210996 and 1001211014.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20024196 + ... + 20024245.

Almost surely, 2^1001211025 is an apocalyptic number.

It is an amenable number.

1001211025 is a deficient number, since it is larger than the sum of its proper divisors (240290677).

1001211025 is an equidigital number, since it uses as much as digits as its factorization.

1001211025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40048451 (or 40048446 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1001211025 is about 31641.9187945358. The cubic root of 1001211025 is about 1000.4035121560.

Adding to 1001211025 its reverse (5201121001), we get a palindrome (6202332026).

The spelling of 1001211025 in words is "one billion, one million, two hundred eleven thousand, twenty-five".