325120021 has 4 divisors (see below), whose sum is σ = 325328544. Its totient is φ = 324911500.

The previous prime is 325120013. The next prime is 325120067. The reversal of 325120021 is 120021523.

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.

It is a cyclic number.

It is not a de Polignac number, because 325120021 - 2³ = 325120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 325119977 and 325120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325123021) 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, 101905 + ... + 105046.

It is an arithmetic number, because the mean of its divisors is an integer number (81332136).

Almost surely, 2^325120021 is an apocalyptic number.

It is an amenable number.

325120021 is a deficient number, since it is larger than the sum of its proper divisors (208523).

325120021 is a wasteful number, since it uses less digits than its factorization.

325120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208522.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 325120021 is about 18031.0848536631. The cubic root of 325120021 is about 687.6190575519.

Adding to 325120021 its reverse (120021523), we get a palindrome (445141544).

The spelling of 325120021 in words is "three hundred twenty-five million, one hundred twenty thousand, twenty-one".