2011020121111 has 4 divisors (see below), whose sum is σ = 2116863285400. Its totient is φ = 1905176956824.

The previous prime is 2011020121043. The next prime is 2011020121133. The reversal of 2011020121111 is 1111210201102.

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 2011020121111 - 2⁷ = 2011020120983 is a prime.

It is a super-2 number, since 2×2011020121111² (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 = 2011020121091 and 2011020121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011021121111) 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, 52921582116 + ... + 52921582153.

It is an arithmetic number, because the mean of its divisors is an integer number (529215821350).

Almost surely, 2^{2011020121111} is an apocalyptic number.

2011020121111 is a deficient number, since it is larger than the sum of its proper divisors (105843164289).

2011020121111 is a wasteful number, since it uses less digits than its factorization.

2011020121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105843164288.

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

Adding to 2011020121111 its reverse (1111210201102), we get a palindrome (3122230322213).

The spelling of 2011020121111 in words is "two trillion, eleven billion, twenty million, one hundred twenty-one thousand, one hundred eleven".