111101120002021 has 8 divisors (see below), whose sum is σ = 111148161291288. Its totient is φ = 111054079968000.

The previous prime is 111101120001983. The next prime is 111101120002069. The reversal of 111101120002021 is 120200021101111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25781057025025 + 85320062976996 = 5077505^2 + 9236886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111101120002021 - 2¹⁵ = 111101119969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101120001992 and 111101120002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101120002121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205068831 + ... + 205609891.

It is an arithmetic number, because the mean of its divisors is an integer number (13893520161411).

Almost surely, 2^{111101120002021} is an apocalyptic number.

It is an amenable number.

111101120002021 is a deficient number, since it is larger than the sum of its proper divisors (47041289267).

111101120002021 is an equidigital number, since it uses as much as digits as its factorization.

111101120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627623.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111101120002021 its reverse (120200021101111), we get a palindrome (231301141103132).

The spelling of 111101120002021 in words is "one hundred eleven trillion, one hundred one billion, one hundred twenty million, two thousand, twenty-one".