11010111020021 has 8 divisors (see below), whose sum is σ = 11657793587544. Its totient is φ = 10362431672320.

The previous prime is 11010111019991. The next prime is 11010111020057. The reversal of 11010111020021 is 12002011101011.

It can be written as a sum of positive squares in 4 ways, for example, as 3652834515121 + 7357276504900 = 1911239^2 + 2712430^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11010111020021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010111019984 and 11010111020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010111022021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12985631 + ... + 13807491.

It is an arithmetic number, because the mean of its divisors is an integer number (1457224198443).

Almost surely, 2^{11010111020021} is an apocalyptic number.

It is an amenable number.

11010111020021 is a deficient number, since it is larger than the sum of its proper divisors (647682567523).

11010111020021 is an equidigital number, since it uses as much as digits as its factorization.

11010111020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609911.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11010111020021 its reverse (12002011101011), we get a palindrome (23012122121032).

The spelling of 11010111020021 in words is "eleven trillion, ten billion, one hundred eleven million, twenty thousand, twenty-one".