111021220212101 has 4 divisors (see below), whose sum is σ = 112426552113600. Its totient is φ = 109615888310604.

The previous prime is 111021220212083. The next prime is 111021220212127. The reversal of 111021220212101 is 101212022120111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111021220212101 - 2³⁴ = 111004040342917 is a prime.

It is a super-2 number, since 2×111021220212101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111021220212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021220212181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702665950631 + ... + 702665950788.

It is an arithmetic number, because the mean of its divisors is an integer number (28106638028400).

Almost surely, 2^{111021220212101} is an apocalyptic number.

It is an amenable number.

111021220212101 is a deficient number, since it is larger than the sum of its proper divisors (1405331901499).

111021220212101 is an equidigital number, since it uses as much as digits as its factorization.

111021220212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405331901498.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111021220212101 its reverse (101212022120111), we get a palindrome (212233242332212).

The spelling of 111021220212101 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred one".