325421221221 has 40 divisors (see below), whose sum is σ = 494508104640. Its totient is φ = 213207567552.

The previous prime is 325421221207. The next prime is 325421221271. The reversal of 325421221221 is 122122124523.

325421221221 is a `hidden beast` number, since 3 + 2 + 5 + 421 + 2 + 212 + 21 = 666.

It is not a de Polignac number, because 325421221221 - 2²⁷ = 325287003493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325421221271) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20670865 + ... + 20686601.

It is an arithmetic number, because the mean of its divisors is an integer number (12362702616).

Almost surely, 2^325421221221 is an apocalyptic number.

It is an amenable number.

325421221221 is a deficient number, since it is larger than the sum of its proper divisors (169086883419).

325421221221 is a wasteful number, since it uses less digits than its factorization.

325421221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20135 (or 20126 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

Adding to 325421221221 its reverse (122122124523), we get a palindrome (447543345744).

The spelling of 325421221221 in words is "three hundred twenty-five billion, four hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".