2121102025 has 12 divisors (see below), whose sum is σ = 3005904832. Its totient is φ = 1454469840.

The previous prime is 2121102001. The next prime is 2121102041. The reversal of 2121102025 is 5202011212.

It is a happy number.

It is not a de Polignac number, because 2121102025 - 2¹⁵ = 2121069257 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 6060117 + ... + 6060466.

Almost surely, 2^2121102025 is an apocalyptic number.

2121102025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121102025 is a deficient number, since it is larger than the sum of its proper divisors (884802807).

2121102025 is a wasteful number, since it uses less digits than its factorization.

2121102025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120600 (or 12120595 counting only the distinct ones).

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

The square root of 2121102025 is about 46055.4234048499. The cubic root of 2121102025 is about 1284.8542128964.

Adding to 2121102025 its reverse (5202011212), we get a palindrome (7323113237).

The spelling of 2121102025 in words is "two billion, one hundred twenty-one million, one hundred two thousand, twenty-five".