1112021122021 has 4 divisors (see below), whose sum is σ = 1115978492844. Its totient is φ = 1108063751200.

The previous prime is 1112021122001. The next prime is 1112021122027. The reversal of 1112021122021 is 1202211202111.

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 449115765921 + 662905356100 = 670161^2 + 814190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112021122021 - 2¹⁹ = 1112020597733 is a prime.

It is a super-2 number, since 2×1112021122021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112021121986 and 1112021122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112021122027) 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, 1978684990 + ... + 1978685551.

It is an arithmetic number, because the mean of its divisors is an integer number (278994623211).

Almost surely, 2^{1112021122021} is an apocalyptic number.

It is an amenable number.

1112021122021 is a deficient number, since it is larger than the sum of its proper divisors (3957370823).

1112021122021 is an equidigital number, since it uses as much as digits as its factorization.

1112021122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957370822.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1112021122021 its reverse (1202211202111), we get a palindrome (2314232324132).

The spelling of 1112021122021 in words is "one trillion, one hundred twelve billion, twenty-one million, one hundred twenty-two thousand, twenty-one".