111010221221211 has 96 divisors (see below), whose sum is σ = 185557801665600. Its totient is φ = 63379552066560.

The previous prime is 111010221221183. The next prime is 111010221221227. The reversal of 111010221221211 is 112122122010111.

It is a happy number.

111010221221211 is a `hidden beast` number, since 1 + 1 + 1 + 0 + 10 + 221 + 221 + 211 = 666.

It is not a de Polignac number, because 111010221221211 - 2⁶ = 111010221221147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111010221221111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29265661 + ... + 32840513.

It is an arithmetic number, because the mean of its divisors is an integer number (1932893767350).

Almost surely, 2^{111010221221211} is an apocalyptic number.

111010221221211 is a deficient number, since it is larger than the sum of its proper divisors (74547580444389).

111010221221211 is a wasteful number, since it uses less digits than its factorization.

111010221221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575181 (or 3575178 counting only the distinct ones).

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

Adding to 111010221221211 its reverse (112122122010111), we get a palindrome (223132343231322).

The spelling of 111010221221211 in words is "one hundred eleven trillion, ten billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".