2101122025 has 6 divisors (see below), whose sum is σ = 2605391342. Its totient is φ = 1680897600.

The previous prime is 2101122017. The next prime is 2101122031. The reversal of 2101122025 is 5202211012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 166177881 + 1934944144 = 12891^2 + 43988^2 .

It is not a de Polignac number, because 2101122025 - 2³ = 2101122017 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 (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42022416 + ... + 42022465.

Almost surely, 2^2101122025 is an apocalyptic number.

2101122025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101122025 is a deficient number, since it is larger than the sum of its proper divisors (504269317).

2101122025 is an equidigital number, since it uses as much as digits as its factorization.

2101122025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84044891 (or 84044886 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2101122025 is about 45837.9976111523. The cubic root of 2101122025 is about 1280.8071945134.

Adding to 2101122025 its reverse (5202211012), we get a palindrome (7303333037).

The spelling of 2101122025 in words is "two billion, one hundred one million, one hundred twenty-two thousand, twenty-five".