111201122111021 has 16 divisors (see below), whose sum is σ = 113003389128000. Its totient is φ = 109403112475008.

The previous prime is 111201122110937. The next prime is 111201122111039. The reversal of 111201122111021 is 120111221102111.

It is a cyclic number.

It is not a de Polignac number, because 111201122111021 - 2³⁴ = 111183942241837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201122111081) 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, 228387410 + ... + 228873788.

It is an arithmetic number, because the mean of its divisors is an integer number (7062711820500).

Almost surely, 2^{111201122111021} is an apocalyptic number.

It is an amenable number.

111201122111021 is a deficient number, since it is larger than the sum of its proper divisors (1802267016979).

111201122111021 is a wasteful number, since it uses less digits than its factorization.

111201122111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490748.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111201122111021 its reverse (120111221102111), we get a palindrome (231312343213132).

The spelling of 111201122111021 in words is "one hundred eleven trillion, two hundred one billion, one hundred twenty-two million, one hundred eleven thousand, twenty-one".