111031233020221 has 2 divisors, whose sum is σ = 111031233020222. Its totient is φ = 111031233020220.

The previous prime is 111031233020171. The next prime is 111031233020233. The reversal of 111031233020221 is 122020332130111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81069512907321 + 29961720112900 = 9003861^2 + 5473730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111031233020221 is a prime.

It is a super-2 number, since 2×111031233020221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111031233020192 and 111031233020201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111031233020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515616510110 + 55515616510111.

It is an arithmetic number, because the mean of its divisors is an integer number (55515616510111).

Almost surely, 2^{111031233020221} is an apocalyptic number.

It is an amenable number.

111031233020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111031233020221 is an equidigital number, since it uses as much as digits as its factorization.

111031233020221 is an evil number, because the sum of its binary digits is even.

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

Adding to 111031233020221 its reverse (122020332130111), we get a palindrome (233051565150332).

The spelling of 111031233020221 in words is "one hundred eleven trillion, thirty-one billion, two hundred thirty-three million, twenty thousand, two hundred twenty-one".