2011211020111 has 4 divisors (see below), whose sum is σ = 2011254345424. Its totient is φ = 2011167694800.

The previous prime is 2011211020099. The next prime is 2011211020123. The reversal of 2011211020111 is 1110201121102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2011211020099) and next prime (2011211020123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011211020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011211020091 and 2011211020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011211020171) 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, 21592950 + ... + 21685891.

It is an arithmetic number, because the mean of its divisors is an integer number (502813586356).

Almost surely, 2^{2011211020111} is an apocalyptic number.

2011211020111 is a deficient number, since it is larger than the sum of its proper divisors (43325313).

2011211020111 is an equidigital number, since it uses as much as digits as its factorization.

2011211020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43325312.

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

Adding to 2011211020111 its reverse (1110201121102), we get a palindrome (3121412141213).

The spelling of 2011211020111 in words is "two trillion, eleven billion, two hundred eleven million, twenty thousand, one hundred eleven".