111021220210221 has 32 divisors (see below), whose sum is σ = 165253863075840. Its totient is φ = 73664217644400.

The previous prime is 111021220210123. The next prime is 111021220210283. The reversal of 111021220210221 is 122012022120111.

111021220210221 is a `hidden beast` number, since 1 + 1 + 1 + 0 + 212 + 20 + 210 + 221 = 666.

It is not a de Polignac number, because 111021220210221 - 2¹⁰ = 111021220209197 is a prime.

It is a super-2 number, since 2×111021220210221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111021220210194 and 111021220210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021220210721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22378306 + ... + 26885516.

It is an arithmetic number, because the mean of its divisors is an integer number (5164183221120).

Almost surely, 2^{111021220210221} is an apocalyptic number.

It is an amenable number.

111021220210221 is a deficient number, since it is larger than the sum of its proper divisors (54232642865619).

111021220210221 is a wasteful number, since it uses less digits than its factorization.

111021220210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511534 (or 4511528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111021220210221 its reverse (122012022120111), we get a palindrome (233033242330332).

The spelling of 111021220210221 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-one".