2021021320111 has 4 divisors (see below), whose sum is σ = 2054152817224. Its totient is φ = 1987889823000.

The previous prime is 2021021320091. The next prime is 2021021320141. The reversal of 2021021320111 is 1110231201202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021021320111 - 2²³ = 2021012931503 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 (2021021320141) 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, 16565748465 + ... + 16565748586.

It is an arithmetic number, because the mean of its divisors is an integer number (513538204306).

Almost surely, 2^{2021021320111} is an apocalyptic number.

2021021320111 is a deficient number, since it is larger than the sum of its proper divisors (33131497113).

2021021320111 is an equidigital number, since it uses as much as digits as its factorization.

2021021320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33131497112.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2021021320111 its reverse (1110231201202), we get a palindrome (3131252521313).

The spelling of 2021021320111 in words is "two trillion, twenty-one billion, twenty-one million, three hundred twenty thousand, one hundred eleven".