1111110120021 has 16 divisors (see below), whose sum is σ = 1621911647808. Its totient is φ = 671003625600.

The previous prime is 1111110120007. The next prime is 1111110120023. The reversal of 1111110120021 is 1200210111111.

It is not a de Polignac number, because 1111110120021 - 2¹⁰ = 1111110118997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111110119979 and 1111110120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111110120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59901766 + ... + 59920311.

It is an arithmetic number, because the mean of its divisors is an integer number (101369477988).

Almost surely, 2^{1111110120021} is an apocalyptic number.

1111110120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111110120021 is a deficient number, since it is larger than the sum of its proper divisors (510801527787).

1111110120021 is a wasteful number, since it uses less digits than its factorization.

1111110120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119822372.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111110120021 its reverse (1200210111111), we get a palindrome (2311320231132).

The spelling of 1111110120021 in words is "one trillion, one hundred eleven billion, one hundred ten million, one hundred twenty thousand, twenty-one".