2025122421 has 64 divisors (see below), whose sum is σ = 3259699200. Its totient is φ = 1117247040.

The previous prime is 2025122401. The next prime is 2025122441. The reversal of 2025122421 is 1242215202.

It is an interprime number because it is at equal distance from previous prime (2025122401) and next prime (2025122441).

It is not a de Polignac number, because 2025122421 - 2⁹ = 2025121909 is a prime.

It is a super-2 number, since 2×2025122421² = 8202241640073802482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025122401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3871866 + ... + 3872388.

It is an arithmetic number, because the mean of its divisors is an integer number (50932800).

Almost surely, 2^2025122421 is an apocalyptic number.

2025122421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2025122421 is a deficient number, since it is larger than the sum of its proper divisors (1234576779).

2025122421 is an equidigital number, since it uses as much as digits as its factorization.

2025122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2025122421 is about 45001.3602127758. The cubic root of 2025122421 is about 1265.1744922217.

Adding to 2025122421 its reverse (1242215202), we get a palindrome (3267337623).

The spelling of 2025122421 in words is "two billion, twenty-five million, one hundred twenty-two thousand, four hundred twenty-one".