11111120002021 has 16 divisors (see below), whose sum is σ = 12110332610880. Its totient is φ = 10132558865280.

The previous prime is 11111120002013. The next prime is 11111120002027. The reversal of 11111120002021 is 12020002111111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111120002021 - 2³ = 11111120002013 is a prime.

It is a super-2 number, since 2×11111120002021² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111120001992 and 11111120002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111120002027) 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, 43941370 + ... + 44193508.

It is an arithmetic number, because the mean of its divisors is an integer number (756895788180).

Almost surely, 2^{11111120002021} is an apocalyptic number.

It is an amenable number.

11111120002021 is a deficient number, since it is larger than the sum of its proper divisors (999212608859).

11111120002021 is a wasteful number, since it uses less digits than its factorization.

11111120002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293076.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111120002021 its reverse (12020002111111), we get a palindrome (23131122113132).

The spelling of 11111120002021 in words is "eleven trillion, one hundred eleven billion, one hundred twenty million, two thousand, twenty-one".