111020202121021 has 16 divisors (see below), whose sum is σ = 111361290480000. Its totient is φ = 110679682147776.

The previous prime is 111020202121013. The next prime is 111020202121057. The reversal of 111020202121021 is 120121202020111.

It is a cyclic number.

It is not a de Polignac number, because 111020202121021 - 2³ = 111020202121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020202120986 and 111020202121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020202121321) 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, 4690520175 + ... + 4690543843.

It is an arithmetic number, because the mean of its divisors is an integer number (6960080655000).

Almost surely, 2^{111020202121021} is an apocalyptic number.

It is an amenable number.

111020202121021 is a deficient number, since it is larger than the sum of its proper divisors (341088358979).

111020202121021 is a wasteful number, since it uses less digits than its factorization.

111020202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35076.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111020202121021 its reverse (120121202020111), we get a palindrome (231141404141132).

The spelling of 111020202121021 in words is "one hundred eleven trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, twenty-one".