2021111020111 has 8 divisors (see below), whose sum is σ = 2089779563648. Its totient is φ = 1952659440000.

The previous prime is 2021111020081. The next prime is 2021111020151. The reversal of 2021111020111 is 1110201111202.

It is a happy number.

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 2021111020111 - 2²⁵ = 2021077465679 is a prime.

It is a super-2 number, since 2×2021111020111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021111020091 and 2021111020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111020151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54221910 + ... + 54259171.

It is an arithmetic number, because the mean of its divisors is an integer number (261222445456).

Almost surely, 2^{2021111020111} is an apocalyptic number.

2021111020111 is a deficient number, since it is larger than the sum of its proper divisors (68668543537).

2021111020111 is a wasteful number, since it uses less digits than its factorization.

2021111020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108481713.

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

Adding to 2021111020111 its reverse (1110201111202), we get a palindrome (3131312131313).

The spelling of 2021111020111 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty thousand, one hundred eleven".