111010020120121 has 4 divisors (see below), whose sum is σ = 111014400448512. Its totient is φ = 111005639791732.

The previous prime is 111010020120001. The next prime is 111010020120133. The reversal of 111010020120121 is 121021020010111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111010020120121 - 2²⁹ = 111009483249209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111010020120151) 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, 2190126181 + ... + 2190176866.

It is an arithmetic number, because the mean of its divisors is an integer number (27753600112128).

Almost surely, 2^{111010020120121} is an apocalyptic number.

It is an amenable number.

111010020120121 is a deficient number, since it is larger than the sum of its proper divisors (4380328391).

111010020120121 is an equidigital number, since it uses as much as digits as its factorization.

111010020120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380328390.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111010020120121 its reverse (121021020010111), we get a palindrome (232031040130232).

The spelling of 111010020120121 in words is "one hundred eleven trillion, ten billion, twenty million, one hundred twenty thousand, one hundred twenty-one".