20110021001011 has 2 divisors, whose sum is σ = 20110021001012. Its totient is φ = 20110021001010.

The previous prime is 20110021001009. The next prime is 20110021001099. The reversal of 20110021001011 is 11010012001102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110021001011 - 2¹ = 20110021001009 is a prime.

It is a super-2 number, since 2×20110021001011² (a number of 27 digits) contains 22 as substring.

Together with 20110021001009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20110021001111) 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 as a sum of consecutive naturals, namely, 10055010500505 + 10055010500506.

It is an arithmetic number, because the mean of its divisors is an integer number (10055010500506).

Almost surely, 2^{20110021001011} is an apocalyptic number.

20110021001011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110021001011 is an equidigital number, since it uses as much as digits as its factorization.

20110021001011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20110021001011 its reverse (11010012001102), we get a palindrome (31120033002113).

The spelling of 20110021001011 in words is "twenty trillion, one hundred ten billion, twenty-one million, one thousand, eleven".