111020122011121 has 4 divisors (see below), whose sum is σ = 114848402080500. Its totient is φ = 107191841941744.

The previous prime is 111020122011109. The next prime is 111020122011131. The reversal of 111020122011121 is 121110221020111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43594854969600 + 67425267041521 = 6602640^2 + 8211289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020122011121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020122011095 and 111020122011104.

It is not an unprimeable number, because it can be changed into a prime (111020122011131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914140034646 + ... + 1914140034703.

It is an arithmetic number, because the mean of its divisors is an integer number (28712100520125).

Almost surely, 2^{111020122011121} is an apocalyptic number.

It is an amenable number.

111020122011121 is a deficient number, since it is larger than the sum of its proper divisors (3828280069379).

111020122011121 is an equidigital number, since it uses as much as digits as its factorization.

111020122011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828280069378.

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

Adding to 111020122011121 its reverse (121110221020111), we get a palindrome (232130343031232).

The spelling of 111020122011121 in words is "one hundred eleven trillion, twenty billion, one hundred twenty-two million, eleven thousand, one hundred twenty-one".