111101012000021 has 4 divisors (see below), whose sum is σ = 111480196341612. Its totient is φ = 110721827658432.

The previous prime is 111101011999997. The next prime is 111101012000057. The reversal of 111101012000021 is 120000210101111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96668990897521 + 14432021102500 = 9832039^2 + 3798950^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101012000021 - 2³⁴ = 111083832130837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101011999966 and 111101012000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101012000221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189592170356 + ... + 189592170941.

It is an arithmetic number, because the mean of its divisors is an integer number (27870049085403).

Almost surely, 2^{111101012000021} is an apocalyptic number.

It is an amenable number.

111101012000021 is a deficient number, since it is larger than the sum of its proper divisors (379184341591).

111101012000021 is an equidigital number, since it uses as much as digits as its factorization.

111101012000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379184341590.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111101012000021 its reverse (120000210101111), we get a palindrome (231101222101132).

The spelling of 111101012000021 in words is "one hundred eleven trillion, one hundred one billion, twelve million, twenty-one", and thus it is an aban number.