31113112030221 has 32 divisors (see below), whose sum is σ = 45802986203520. Its totient is φ = 18663987456000.

The previous prime is 31113112030213. The next prime is 31113112030279. The reversal of 31113112030221 is 12203021131113.

It is not a de Polignac number, because 31113112030221 - 2³ = 31113112030213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113112038221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6180291 + ... + 10021088.

It is an arithmetic number, because the mean of its divisors is an integer number (1431343318860).

Almost surely, 2^{31113112030221} is an apocalyptic number.

It is an amenable number.

31113112030221 is a deficient number, since it is larger than the sum of its proper divisors (14689874173299).

31113112030221 is a wasteful number, since it uses less digits than its factorization.

31113112030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16202637.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31113112030221 its reverse (12203021131113), we get a palindrome (43316133161334).

The spelling of 31113112030221 in words is "thirty-one trillion, one hundred thirteen billion, one hundred twelve million, thirty thousand, two hundred twenty-one".