3201230031221 has 4 divisors (see below), whose sum is σ = 3201243586092. Its totient is φ = 3201216476352.

The previous prime is 3201230031217. The next prime is 3201230031227. The reversal of 3201230031221 is 1221300321023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 263482023025 + 2937748008196 = 513305^2 + 1713986^2 .

It is a cyclic number.

It is not a de Polignac number, because 3201230031221 - 2² = 3201230031217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3201230031193 and 3201230031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201230031227) 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, 6416786 + ... + 6897651.

It is an arithmetic number, because the mean of its divisors is an integer number (800310896523).

Almost surely, 2^{3201230031221} is an apocalyptic number.

It is an amenable number.

3201230031221 is a deficient number, since it is larger than the sum of its proper divisors (13554871).

3201230031221 is a wasteful number, since it uses less digits than its factorization.

3201230031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13554870.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 3201230031221 its reverse (1221300321023), we get a palindrome (4422530352244).

The spelling of 3201230031221 in words is "three trillion, two hundred one billion, two hundred thirty million, thirty-one thousand, two hundred twenty-one".