31330022332221 has 6 divisors (see below), whose sum is σ = 45254476702110. Its totient is φ = 20886681554808.

The previous prime is 31330022332139. The next prime is 31330022332237. The reversal of 31330022332221 is 12223322003313.

31330022332221 is a `hidden beast` number, since 3 + 1 + 3 + 300 + 2 + 2 + 332 + 2 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31273383092121 + 56639240100 = 5592261^2 + 237990^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31330022332221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330022332291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1740556796226 + ... + 1740556796243.

It is an arithmetic number, because the mean of its divisors is an integer number (7542412783685).

Almost surely, 2^{31330022332221} is an apocalyptic number.

It is an amenable number.

31330022332221 is a deficient number, since it is larger than the sum of its proper divisors (13924454369889).

31330022332221 is a wasteful number, since it uses less digits than its factorization.

31330022332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481113592475 (or 3481113592472 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 31330022332221 its reverse (12223322003313), we get a palindrome (43553344335534).

The spelling of 31330022332221 in words is "thirty-one trillion, three hundred thirty billion, twenty-two million, three hundred thirty-two thousand, two hundred twenty-one".