2211120112021 has 4 divisors (see below), whose sum is σ = 2211146053452. Its totient is φ = 2211094170592.

The previous prime is 2211120112013. The next prime is 2211120112043. The reversal of 2211120112021 is 1202110211122.

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 1452601047121 + 758519064900 = 1205239^2 + 870930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211120112021 - 2³ = 2211120112013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211120111986 and 2211120112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211120112121) 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, 12842440 + ... + 13013473.

It is an arithmetic number, because the mean of its divisors is an integer number (552786513363).

Almost surely, 2^{2211120112021} is an apocalyptic number.

It is an amenable number.

2211120112021 is a deficient number, since it is larger than the sum of its proper divisors (25941431).

2211120112021 is an equidigital number, since it uses as much as digits as its factorization.

2211120112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25941430.

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

Adding to 2211120112021 its reverse (1202110211122), we get a palindrome (3413230323143).

The spelling of 2211120112021 in words is "two trillion, two hundred eleven billion, one hundred twenty million, one hundred twelve thousand, twenty-one".