111100100020221 has 16 divisors (see below), whose sum is σ = 161909368881344. Its totient is φ = 67348855119744.

The previous prime is 111100100020163. The next prime is 111100100020229. The reversal of 111100100020221 is 122020001001111.

It is not a de Polignac number, because 111100100020221 - 2⁹ = 111100100019709 is a prime.

It is a super-2 number, since 2×111100100020221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111100100020197 and 111100100020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100100020229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21259105696 + ... + 21259110921.

It is an arithmetic number, because the mean of its divisors is an integer number (10119335555084).

Almost surely, 2^{111100100020221} is an apocalyptic number.

It is an amenable number.

111100100020221 is a deficient number, since it is larger than the sum of its proper divisors (50809268861123).

111100100020221 is a wasteful number, since it uses less digits than its factorization.

111100100020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42518216700.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111100100020221 its reverse (122020001001111), we get a palindrome (233120101021332).

The spelling of 111100100020221 in words is "one hundred eleven trillion, one hundred billion, one hundred million, twenty thousand, two hundred twenty-one".