101111112110021 has 16 divisors (see below), whose sum is σ = 109486799985024. Its totient is φ = 92821231078464.

The previous prime is 101111112109913. The next prime is 101111112110027. The reversal of 101111112110021 is 120011211111101.

It is a cyclic number.

It is not a de Polignac number, because 101111112110021 - 2¹⁸ = 101111111847877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101111112109978 and 101111112110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111112110027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1941851 + ... + 14352456.

It is an arithmetic number, because the mean of its divisors is an integer number (6842924999064).

Almost surely, 2^{101111112110021} is an apocalyptic number.

It is an amenable number.

101111112110021 is a deficient number, since it is larger than the sum of its proper divisors (8375687875003).

101111112110021 is a wasteful number, since it uses less digits than its factorization.

101111112110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16296940.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 101111112110021 its reverse (120011211111101), we get a palindrome (221122323221122).

The spelling of 101111112110021 in words is "one hundred one trillion, one hundred eleven billion, one hundred twelve million, one hundred ten thousand, twenty-one".