203132320221 has 64 divisors (see below), whose sum is σ = 303261843456. Its totient is φ = 120335846400.

The previous prime is 203132320217. The next prime is 203132320229. The reversal of 203132320221 is 122023231302.

It is a happy number.

It is not a de Polignac number, because 203132320221 - 2² = 203132320217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203132320229) 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, 108567916 + ... + 108569786.

It is an arithmetic number, because the mean of its divisors is an integer number (4738466304).

Almost surely, 2^203132320221 is an apocalyptic number.

It is an amenable number.

203132320221 is a deficient number, since it is larger than the sum of its proper divisors (100129523235).

203132320221 is a wasteful number, since it uses less digits than its factorization.

203132320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203132320221 its reverse (122023231302), we get a palindrome (325155551523).

The spelling of 203132320221 in words is "two hundred three billion, one hundred thirty-two million, three hundred twenty thousand, two hundred twenty-one".