111121320121 has 16 divisors (see below), whose sum is σ = 130506989184. Its totient is φ = 92632466304.

The previous prime is 111121320091. The next prime is 111121320139. The reversal of 111121320121 is 121023121111.

It is a happy number.

It is not a de Polignac number, because 111121320121 - 2¹³ = 111121311929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121320095 and 111121320104.

It is not an unprimeable number, because it can be changed into a prime (111121420121) 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, 722086 + ... + 862351.

It is an arithmetic number, because the mean of its divisors is an integer number (8156686824).

Almost surely, 2^111121320121 is an apocalyptic number.

It is an amenable number.

111121320121 is a deficient number, since it is larger than the sum of its proper divisors (19385669063).

111121320121 is a wasteful number, since it uses less digits than its factorization.

111121320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584720.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111121320121 its reverse (121023121111), we get a palindrome (232144441232).

The spelling of 111121320121 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-one".