31304220214221 has 12 divisors (see below), whose sum is σ = 45246210977760. Its totient is φ = 20856093680520.

The previous prime is 31304220214219. The next prime is 31304220214237. The reversal of 31304220214221 is 12241202240313.

31304220214221 is a `hidden beast` number, since 3 + 1 + 3 + 0 + 4 + 220 + 214 + 221 = 666.

It is not a de Polignac number, because 31304220214221 - 2¹ = 31304220214219 is a prime.

It is a super-2 number, since 2×31304220214221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31304220214321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115523715 + ... + 1115551776.

It is an arithmetic number, because the mean of its divisors is an integer number (3770517581480).

Almost surely, 2^{31304220214221} is an apocalyptic number.

It is an amenable number.

31304220214221 is a deficient number, since it is larger than the sum of its proper divisors (13941990763539).

31304220214221 is a wasteful number, since it uses less digits than its factorization.

31304220214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231077056 (or 2231077053 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 31304220214221 its reverse (12241202240313), we get a palindrome (43545422454534).

The spelling of 31304220214221 in words is "thirty-one trillion, three hundred four billion, two hundred twenty million, two hundred fourteen thousand, two hundred twenty-one".