20310310031221 has 8 divisors (see below), whose sum is σ = 23220402217344. Its totient is φ = 17402372676240.

The previous prime is 20310310031197. The next prime is 20310310031237. The reversal of 20310310031221 is 12213001301302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20310310031221 - 2⁹ = 20310310030709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310310031281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538687585 + ... + 538725286.

It is an arithmetic number, because the mean of its divisors is an integer number (2902550277168).

Almost surely, 2^{20310310031221} is an apocalyptic number.

It is an amenable number.

20310310031221 is a deficient number, since it is larger than the sum of its proper divisors (2910092186123).

20310310031221 is a wasteful number, since it uses less digits than its factorization.

20310310031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077415571.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20310310031221 its reverse (12213001301302), we get a palindrome (32523311332523).

The spelling of 20310310031221 in words is "twenty trillion, three hundred ten billion, three hundred ten million, thirty-one thousand, two hundred twenty-one".