31113122030221 has 32 divisors (see below), whose sum is σ = 40138471296000. Its totient is φ = 23414107812480.

The previous prime is 31113122030183. The next prime is 31113122030261. The reversal of 31113122030221 is 12203022131113.

It is a de Polignac number, because none of the positive numbers 2^k-31113122030221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31113122030192 and 31113122030201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113122030261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52496871 + ... + 53086228.

It is an arithmetic number, because the mean of its divisors is an integer number (1254327228000).

Almost surely, 2^{31113122030221} is an apocalyptic number.

It is an amenable number.

31113122030221 is a deficient number, since it is larger than the sum of its proper divisors (9025349265779).

31113122030221 is a wasteful number, since it uses less digits than its factorization.

31113122030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105583249.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31113122030221 its reverse (12203022131113), we get a palindrome (43316144161334).

The spelling of 31113122030221 in words is "thirty-one trillion, one hundred thirteen billion, one hundred twenty-two million, thirty thousand, two hundred twenty-one".