2011111211021 has 16 divisors (see below), whose sum is σ = 2290414579200. Its totient is φ = 1749043800000.

The previous prime is 2011111211017. The next prime is 2011111211113. The reversal of 2011111211021 is 1201121111102.

It is a cyclic number.

It is not a de Polignac number, because 2011111211021 - 2² = 2011111211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011111210987 and 2011111211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111219021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28884605 + ... + 28954146.

It is an arithmetic number, because the mean of its divisors is an integer number (143150911200).

Almost surely, 2^{2011111211021} is an apocalyptic number.

It is an amenable number.

2011111211021 is a deficient number, since it is larger than the sum of its proper divisors (279303368179).

2011111211021 is a wasteful number, since it uses less digits than its factorization.

2011111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57838900.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2011111211021 its reverse (1201121111102), we get a palindrome (3212232322123).

The spelling of 2011111211021 in words is "two trillion, eleven billion, one hundred eleven million, two hundred eleven thousand, twenty-one".