111020121012111 has 16 divisors (see below), whose sum is σ = 148240095988608. Its totient is φ = 73906783020000.

The previous prime is 111020121012077. The next prime is 111020121012131. The reversal of 111020121012111 is 111210121020111.

It is not a de Polignac number, because 111020121012111 - 2³³ = 111011531077519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020121012131) 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, 165354036 + ... + 166024086.

It is an arithmetic number, because the mean of its divisors is an integer number (9265005999288).

Almost surely, 2^{111020121012111} is an apocalyptic number.

111020121012111 is a deficient number, since it is larger than the sum of its proper divisors (37219974976497).

111020121012111 is an equidigital number, since it uses as much as digits as its factorization.

111020121012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749542.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111020121012111 its reverse (111210121020111), we get a palindrome (222230242032222).

The spelling of 111020121012111 in words is "one hundred eleven trillion, twenty billion, one hundred twenty-one million, twelve thousand, one hundred eleven".