2121252025 has 6 divisors (see below), whose sum is σ = 2630352542. Its totient is φ = 1697001600.

The previous prime is 2121252013. The next prime is 2121252037. The reversal of 2121252025 is 5202521212.

It is an interprime number because it is at equal distance from previous prime (2121252013) and next prime (2121252037).

It can be written as a sum of positive squares in 3 ways, for example, as 513883561 + 1607368464 = 22669^2 + 40092^2 .

It is not a de Polignac number, because 2121252025 - 2⁹ = 2121251513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121251987 and 2121252005.

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, 42425016 + ... + 42425065.

Almost surely, 2^2121252025 is an apocalyptic number.

2121252025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121252025 is a deficient number, since it is larger than the sum of its proper divisors (509100517).

2121252025 is an equidigital number, since it uses as much as digits as its factorization.

2121252025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84850091 (or 84850086 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2121252025 is about 46057.0518487669. The cubic root of 2121252025 is about 1284.8844996037.

Adding to 2121252025 its reverse (5202521212), we get a palindrome (7323773237).

It can be divided in two parts, 21212 and 52025, that added together give a palindrome (73237).

The spelling of 2121252025 in words is "two billion, one hundred twenty-one million, two hundred fifty-two thousand, twenty-five".