111020021011121 has 16 divisors (see below), whose sum is σ = 114099056438400. Its totient is φ = 107963992485888.

The previous prime is 111020021011099. The next prime is 111020021011127. The reversal of 111020021011121 is 121110120020111.

It is a cyclic number.

It is not a de Polignac number, because 111020021011121 - 2¹⁸ = 111020020748977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020021011096 and 111020021011105.

It is not an unprimeable number, because it can be changed into a prime (111020021011127) 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, 20436740 + ... + 25292298.

It is an arithmetic number, because the mean of its divisors is an integer number (7131191027400).

Almost surely, 2^{111020021011121} is an apocalyptic number.

It is an amenable number.

111020021011121 is a deficient number, since it is larger than the sum of its proper divisors (3079035427279).

111020021011121 is a wasteful number, since it uses less digits than its factorization.

111020021011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857928.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111020021011121 its reverse (121110120020111), we get a palindrome (232130141031232).

The spelling of 111020021011121 in words is "one hundred eleven trillion, twenty billion, twenty-one million, eleven thousand, one hundred twenty-one".