111000221110021 has 8 divisors (see below), whose sum is σ = 111020003754264. Its totient is φ = 110980440130560.

The previous prime is 111000221110007. The next prime is 111000221110067. The reversal of 111000221110021 is 120011122000111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73305361041025 + 37694860068996 = 8561855^2 + 6139614^2 .

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 111000221110021 - 2²³ = 111000212721413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111000221109983 and 111000221110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000221110081) 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, 136958701 + ... + 137766781.

It is an arithmetic number, because the mean of its divisors is an integer number (13877500469283).

Almost surely, 2^{111000221110021} is an apocalyptic number.

It is an amenable number.

111000221110021 is a deficient number, since it is larger than the sum of its proper divisors (19782644243).

111000221110021 is an equidigital number, since it uses as much as digits as its factorization.

111000221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832391.

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

Adding to 111000221110021 its reverse (120011122000111), we get a palindrome (231011343110132).

The spelling of 111000221110021 in words is "one hundred eleven trillion, two hundred twenty-one million, one hundred ten thousand, twenty-one".