111101012020021 has 8 divisors (see below), whose sum is σ = 111179771389440. Its totient is φ = 111022269218112.

The previous prime is 111101012020003. The next prime is 111101012020039. The reversal of 111101012020021 is 120020210101111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111101012020003) and next prime (111101012020039).

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 111101012020021 - 2⁵ = 111101012019989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101012019983 and 111101012020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101012020091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9290220 + ... + 17564458.

It is an arithmetic number, because the mean of its divisors is an integer number (13897471423680).

Almost surely, 2^{111101012020021} is an apocalyptic number.

It is an amenable number.

111101012020021 is a deficient number, since it is larger than the sum of its proper divisors (78759369419).

111101012020021 is an equidigital number, since it uses as much as digits as its factorization.

111101012020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8283755.

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

Adding to 111101012020021 its reverse (120020210101111), we get a palindrome (231121222121132).

The spelling of 111101012020021 in words is "one hundred eleven trillion, one hundred one billion, twelve million, twenty thousand, twenty-one".