111221211220011 has 6 divisors (see below), whose sum is σ = 160652860651140. Its totient is φ = 74147474146668.

The previous prime is 111221211219991. The next prime is 111221211220013. The reversal of 111221211220011 is 110022112122111.

It is a happy number.

111221211220011 is a `hidden beast` number, since 1 + 1 + 1 + 221 + 211 + 220 + 0 + 11 = 666.

It is not a de Polignac number, because 111221211220011 - 2¹⁰ = 111221211218987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221211220013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6178956178881 + ... + 6178956178898.

It is an arithmetic number, because the mean of its divisors is an integer number (26775476775190).

Almost surely, 2^{111221211220011} is an apocalyptic number.

111221211220011 is a deficient number, since it is larger than the sum of its proper divisors (49431649431129).

111221211220011 is a wasteful number, since it uses less digits than its factorization.

111221211220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12357912357785 (or 12357912357782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111221211220011 its reverse (110022112122111), we get a palindrome (221243323342122).

The spelling of 111221211220011 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, eleven".