1112220220021 has 4 divisors (see below), whose sum is σ = 1130453338444. Its totient is φ = 1093987101600.

The previous prime is 1112220220009. The next prime is 1112220220051. The reversal of 1112220220021 is 1200220222111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 616201450225 + 496018769796 = 784985^2 + 704286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112220220021 - 2⁷ = 1112220219893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112220219977 and 1112220220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112220220051) 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, 9116559120 + ... + 9116559241.

It is an arithmetic number, because the mean of its divisors is an integer number (282613334611).

Almost surely, 2^{1112220220021} is an apocalyptic number.

It is an amenable number.

1112220220021 is a deficient number, since it is larger than the sum of its proper divisors (18233118423).

1112220220021 is an equidigital number, since it uses as much as digits as its factorization.

1112220220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18233118422.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1112220220021 its reverse (1200220222111), we get a palindrome (2312440442132).

The spelling of 1112220220021 in words is "one trillion, one hundred twelve billion, two hundred twenty million, two hundred twenty thousand, twenty-one".