111021023221 has 2 divisors, whose sum is σ = 111021023222. Its totient is φ = 111021023220.

The previous prime is 111021023167. The next prime is 111021023233. The reversal of 111021023221 is 122320120111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67886302500 + 43134720721 = 260550^2 + 207689^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021023221 - 2⁷ = 111021023093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111021023195 and 111021023204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021023251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510511610 + 55510511611.

It is an arithmetic number, because the mean of its divisors is an integer number (55510511611).

Almost surely, 2^111021023221 is an apocalyptic number.

It is an amenable number.

111021023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021023221 is an equidigital number, since it uses as much as digits as its factorization.

111021023221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111021023221 its reverse (122320120111), we get a palindrome (233341143332).

The spelling of 111021023221 in words is "one hundred eleven billion, twenty-one million, twenty-three thousand, two hundred twenty-one".