111021202212021 has 32 divisors (see below), whose sum is σ = 172233435294720. Its totient is φ = 70545965835312.

The previous prime is 111021202212017. The next prime is 111021202212049. The reversal of 111021202212021 is 120212202120111.

It is not a de Polignac number, because 111021202212021 - 2² = 111021202212017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111021202211985 and 111021202212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021202212001) 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, 315686631 + ... + 316038116.

It is an arithmetic number, because the mean of its divisors is an integer number (5382294852960).

Almost surely, 2^{111021202212021} is an apocalyptic number.

It is an amenable number.

111021202212021 is a deficient number, since it is larger than the sum of its proper divisors (61212233082699).

111021202212021 is a wasteful number, since it uses less digits than its factorization.

111021202212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631725062 (or 631725056 counting only the distinct ones).

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

Adding to 111021202212021 its reverse (120212202120111), we get a palindrome (231233404332132).

The spelling of 111021202212021 in words is "one hundred eleven trillion, twenty-one billion, two hundred two million, two hundred twelve thousand, twenty-one".