111201662121 has 48 divisors (see below), whose sum is σ = 177085009920. Its totient is φ = 61788117600.

The previous prime is 111201662107. The next prime is 111201662123. The reversal of 111201662121 is 121266102111.

It is not a de Polignac number, because 111201662121 - 2⁷ = 111201661993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111201662091 and 111201662100.

It is not an unprimeable number, because it can be changed into a prime (111201662123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46245 + ... + 473858.

It is an arithmetic number, because the mean of its divisors is an integer number (3689271040).

Almost surely, 2^111201662121 is an apocalyptic number.

111201662121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111201662121 is a deficient number, since it is larger than the sum of its proper divisors (65883347799).

111201662121 is a wasteful number, since it uses less digits than its factorization.

111201662121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520178 (or 520167 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 111201662121 its reverse (121266102111), we get a palindrome (232467764232).

The spelling of 111201662121 in words is "one hundred eleven billion, two hundred one million, six hundred sixty-two thousand, one hundred twenty-one".