2111021020111 has 4 divisors (see below), whose sum is σ = 2111037711472. Its totient is φ = 2111004328752.

The previous prime is 2111021020079. The next prime is 2111021020123. The reversal of 2111021020111 is 1110201201112.

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 2111021020111 - 2⁵ = 2111021020079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111021020091 and 2111021020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111021020151) 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 3 ways as a sum of consecutive naturals, for example, 8154510 + ... + 8409403.

It is an arithmetic number, because the mean of its divisors is an integer number (527759427868).

Almost surely, 2^{2111021020111} is an apocalyptic number.

2111021020111 is a deficient number, since it is larger than the sum of its proper divisors (16691361).

2111021020111 is a wasteful number, since it uses less digits than its factorization.

2111021020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691360.

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

Adding to 2111021020111 its reverse (1110201201112), we get a palindrome (3221222221223).

The spelling of 2111021020111 in words is "two trillion, one hundred eleven billion, twenty-one million, twenty thousand, one hundred eleven".