2111223442021 has 8 divisors (see below), whose sum is σ = 2145981213144. Its totient is φ = 2076470430720.

The previous prime is 2111223442019. The next prime is 2111223442033. The reversal of 2111223442021 is 1202443221112.

It can be written as a sum of positive squares in 4 ways, for example, as 209896841025 + 1901326600996 = 458145^2 + 1378886^2 .

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 2111223442021 - 2¹ = 2111223442019 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 (2111223442001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289996 + ... + 2075221.

It is an arithmetic number, because the mean of its divisors is an integer number (268247651643).

Almost surely, 2^{2111223442021} is an apocalyptic number.

It is an amenable number.

2111223442021 is a deficient number, since it is larger than the sum of its proper divisors (34757771123).

2111223442021 is a wasteful number, since it uses less digits than its factorization.

2111223442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379911.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 2111223442021 its reverse (1202443221112), we get a palindrome (3313666663133).

The spelling of 2111223442021 in words is "two trillion, one hundred eleven billion, two hundred twenty-three million, four hundred forty-two thousand, twenty-one".