2211022112021 has 4 divisors (see below), whose sum is σ = 2227160959692. Its totient is φ = 2194883264352.

The previous prime is 2211022112003. The next prime is 2211022112059. The reversal of 2211022112021 is 1202112201122.

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 1407103653796 + 803918458225 = 1186214^2 + 896615^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211022112021 - 2⁶ = 2211022111957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211022111021) 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, 8069423630 + ... + 8069423903.

It is an arithmetic number, because the mean of its divisors is an integer number (556790239923).

Almost surely, 2^{2211022112021} is an apocalyptic number.

It is an amenable number.

2211022112021 is a deficient number, since it is larger than the sum of its proper divisors (16138847671).

2211022112021 is a wasteful number, since it uses less digits than its factorization.

2211022112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138847670.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211022112021 its reverse (1202112201122), we get a palindrome (3413134313143).

The spelling of 2211022112021 in words is "two trillion, two hundred eleven billion, twenty-two million, one hundred twelve thousand, twenty-one".