2021020202111 has 4 divisors (see below), whose sum is σ = 2041030303224. Its totient is φ = 2001010101000.

The previous prime is 2021020202081. The next prime is 2021020202119. The reversal of 2021020202111 is 1112020201202.

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 2021020202111 - 2¹⁴ = 2021020185727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021020202119) 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, 10005050405 + ... + 10005050606.

It is an arithmetic number, because the mean of its divisors is an integer number (510257575806).

Almost surely, 2^{2021020202111} is an apocalyptic number.

2021020202111 is a deficient number, since it is larger than the sum of its proper divisors (20010101113).

2021020202111 is a wasteful number, since it uses less digits than its factorization.

2021020202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010101112.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021020202111 its reverse (1112020201202), we get a palindrome (3133040403313).

Subtracting from 2021020202111 its reverse (1112020201202), we obtain a palindrome (909000000909).

The spelling of 2021020202111 in words is "two trillion, twenty-one billion, twenty million, two hundred two thousand, one hundred eleven".