2025131021 has 4 divisors (see below), whose sum is σ = 2025728832. Its totient is φ = 2024533212.

The previous prime is 2025130981. The next prime is 2025131057. The reversal of 2025131021 is 1201315202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1201315202 = 2 ⋅600657601.

It is a cyclic number.

It is not a de Polignac number, because 2025131021 - 2⁶ = 2025130957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025131921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293795 + ... + 300608.

It is an arithmetic number, because the mean of its divisors is an integer number (506432208).

Almost surely, 2^2025131021 is an apocalyptic number.

It is an amenable number.

2025131021 is a deficient number, since it is larger than the sum of its proper divisors (597811).

2025131021 is an equidigital number, since it uses as much as digits as its factorization.

2025131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597810.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2025131021 is about 45001.4557653416. The cubic root of 2025131021 is about 1265.1762831398.

Adding to 2025131021 its reverse (1201315202), we get a palindrome (3226446223).

The spelling of 2025131021 in words is "two billion, twenty-five million, one hundred thirty-one thousand, twenty-one".