111020000021 has 8 divisors (see below), whose sum is σ = 128136238464. Its totient is φ = 94217821200.

The previous prime is 111020000009. The next prime is 111020000033. The reversal of 111020000021 is 120000020111.

It is an interprime number because it is at equal distance from previous prime (111020000009) and next prime (111020000033).

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 111020000021 - 2¹⁴ = 111019983637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111019999963 and 111020000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020000321) 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 7 ways as a sum of consecutive naturals, for example, 78514145 + ... + 78515558.

It is an arithmetic number, because the mean of its divisors is an integer number (16017029808).

Almost surely, 2^111020000021 is an apocalyptic number.

It is an amenable number.

111020000021 is a deficient number, since it is larger than the sum of its proper divisors (17116238443).

111020000021 is a wasteful number, since it uses less digits than its factorization.

111020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157029811.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 111020000021 its reverse (120000020111), we get a palindrome (231020020132).

The spelling of 111020000021 in words is "one hundred eleven billion, twenty million, twenty-one", and thus it is an aban number.