1111111000021 has 8 divisors (see below), whose sum is σ = 1212154058304. Its totient is φ = 1010073436320.

The previous prime is 1111111000009. The next prime is 1111111000031. The reversal of 1111111000021 is 1200001111111.

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

It is a cyclic number.

It is not a de Polignac number, because 1111111000021 - 2⁷ = 1111110999893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111110999971 and 1111111000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111111000031) 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, 945001 + ... + 1765006.

It is an arithmetic number, because the mean of its divisors is an integer number (151519257288).

Almost surely, 2^{1111111000021} is an apocalyptic number.

1111111000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111111000021 is a deficient number, since it is larger than the sum of its proper divisors (101043058283).

1111111000021 is a wasteful number, since it uses less digits than its factorization.

1111111000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747291.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1111111000021 its reverse (1200001111111), we get a palindrome (2311112111132).

The spelling of 1111111000021 in words is "one trillion, one hundred eleven billion, one hundred eleven million, twenty-one", and thus it is an aban number.