111201110221021 has 2 divisors, whose sum is σ = 111201110221022. Its totient is φ = 111201110221020.

The previous prime is 111201110221009. The next prime is 111201110221039. The reversal of 111201110221021 is 120122011102111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100790556302500 + 10410553918521 = 10039450^2 + 3226539^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201110221021 - 2¹⁵ = 111201110188253 is a prime.

It is a super-2 number, since 2×111201110221021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111201110220986 and 111201110221004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111201111221021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600555110510 + 55600555110511.

It is an arithmetic number, because the mean of its divisors is an integer number (55600555110511).

Almost surely, 2^{111201110221021} is an apocalyptic number.

It is an amenable number.

111201110221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201110221021 is an equidigital number, since it uses as much as digits as its factorization.

111201110221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111201110221021 its reverse (120122011102111), we get a palindrome (231323121323132).

The spelling of 111201110221021 in words is "one hundred eleven trillion, two hundred one billion, one hundred ten million, two hundred twenty-one thousand, twenty-one".