11112111020021 has 16 divisors (see below), whose sum is σ = 13108472766720. Its totient is φ = 9305397319680.

The previous prime is 11112111019883. The next prime is 11112111020027. The reversal of 11112111020021 is 12002011121111.

It is not a de Polignac number, because 11112111020021 - 2³⁰ = 11111037278197 is a prime.

It is a super-3 number, since 3×11112111020021³ (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 = 11112111019978 and 11112111020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111020027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632151356 + ... + 632168933.

It is an arithmetic number, because the mean of its divisors is an integer number (819279547920).

Almost surely, 2^{11112111020021} is an apocalyptic number.

11112111020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11112111020021 is a deficient number, since it is larger than the sum of its proper divisors (1996361746699).

11112111020021 is a wasteful number, since it uses less digits than its factorization.

11112111020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264320364.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11112111020021 its reverse (12002011121111), we get a palindrome (23114122141132).

The spelling of 11112111020021 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, twenty thousand, twenty-one".