2011012020011 has 4 divisors (see below), whose sum is σ = 2011067823024. Its totient is φ = 2010956217000.

The previous prime is 2011012019981. The next prime is 2011012020013. The reversal of 2011012020011 is 1100202101102.

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 2011012020011 - 2²² = 2011007825707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011012019974 and 2011012020001.

It is not an unprimeable number, because it can be changed into a prime (2011012020013) 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, 27847415 + ... + 27919536.

It is an arithmetic number, because the mean of its divisors is an integer number (502766955756).

Almost surely, 2^{2011012020011} is an apocalyptic number.

2011012020011 is a deficient number, since it is larger than the sum of its proper divisors (55803013).

2011012020011 is an equidigital number, since it uses as much as digits as its factorization.

2011012020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55803012.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2011012020011 its reverse (1100202101102), we get a palindrome (3111214121113).

The spelling of 2011012020011 in words is "two trillion, eleven billion, twelve million, twenty thousand, eleven".