11211110021011 has 4 divisors (see below), whose sum is σ = 11211116970024. Its totient is φ = 11211103072000.

The previous prime is 11211110020997. The next prime is 11211110021081. The reversal of 11211110021011 is 11012001111211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11211110021011 - 2⁷ = 11211110020883 is a prime.

It is a super-3 number, since 3×11211110021011³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211110020982 and 11211110021000.

It is not an unprimeable number, because it can be changed into a prime (11211110021081) 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 in 3 ways as a sum of consecutive naturals, for example, 345336 + ... + 4747786.

It is an arithmetic number, because the mean of its divisors is an integer number (2802779242506).

Almost surely, 2^{11211110021011} is an apocalyptic number.

11211110021011 is a deficient number, since it is larger than the sum of its proper divisors (6949013).

11211110021011 is an equidigital number, since it uses as much as digits as its factorization.

11211110021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949012.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11211110021011 its reverse (11012001111211), we get a palindrome (22223111132222).

The spelling of 11211110021011 in words is "eleven trillion, two hundred eleven billion, one hundred ten million, twenty-one thousand, eleven".