111020113102121 has 4 divisors (see below), whose sum is σ = 111020511946500. Its totient is φ = 111019714257744.

The previous prime is 111020113102081. The next prime is 111020113102123. The reversal of 111020113102121 is 121201311020111.

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 63504403171225 + 47515709930896 = 7968965^2 + 6893164^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020113102121 - 2³⁰ = 111019039360297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111020113102121.

It is not an unprimeable number, because it can be changed into a prime (111020113102123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199004366 + ... + 199561463.

It is an arithmetic number, because the mean of its divisors is an integer number (27755127986625).

Almost surely, 2^{111020113102121} is an apocalyptic number.

It is an amenable number.

111020113102121 is a deficient number, since it is larger than the sum of its proper divisors (398844379).

111020113102121 is an equidigital number, since it uses as much as digits as its factorization.

111020113102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398844378.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 111020113102121 its reverse (121201311020111), we get a palindrome (232221424122232).

The spelling of 111020113102121 in words is "one hundred eleven trillion, twenty billion, one hundred thirteen million, one hundred two thousand, one hundred twenty-one".