111020212102221 has 96 divisors (see below), whose sum is σ = 167264306581632. Its totient is φ = 70900040171520.

The previous prime is 111020212102207. The next prime is 111020212102243. The reversal of 111020212102221 is 122201212020111.

111020212102221 is a `hidden beast` number, since 1 + 110 + 20 + 212 + 102 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-111020212102221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020212102194 and 111020212102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020212122221) 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, 5018305266 + ... + 5018327388.

It is an arithmetic number, because the mean of its divisors is an integer number (1742336526892).

Almost surely, 2^{111020212102221} is an apocalyptic number.

It is an amenable number.

111020212102221 is a deficient number, since it is larger than the sum of its proper divisors (56244094479411).

111020212102221 is a wasteful number, since it uses less digits than its factorization.

111020212102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23163 (or 23160 counting only the distinct ones).

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

Adding to 111020212102221 its reverse (122201212020111), we get a palindrome (233221424122332).

The spelling of 111020212102221 in words is "one hundred eleven trillion, twenty billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".