2021111102011 has 4 divisors (see below), whose sum is σ = 2022156686512. Its totient is φ = 2020065517512.

The previous prime is 2021111101991. The next prime is 2021111102081. The reversal of 2021111102011 is 1102011111202.

It is a happy number.

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 2021111102011 - 2¹³ = 2021111093819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021111101982 and 2021111102000.

It is not an unprimeable number, because it can be changed into a prime (2021111102081) 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, 522789351 + ... + 522793216.

It is an arithmetic number, because the mean of its divisors is an integer number (505539171628).

Almost surely, 2^{2021111102011} is an apocalyptic number.

2021111102011 is a deficient number, since it is larger than the sum of its proper divisors (1045584501).

2021111102011 is a wasteful number, since it uses less digits than its factorization.

2021111102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045584500.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2021111102011 its reverse (1102011111202), we get a palindrome (3123122213213).

The spelling of 2021111102011 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred two thousand, eleven".