111011210121 has 16 divisors (see below), whose sum is σ = 170711868800. Its totient is φ = 62853003648.

The previous prime is 111011210071. The next prime is 111011210137. The reversal of 111011210121 is 121012110111.

It is not a de Polignac number, because 111011210121 - 2⁷ = 111011209993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011210097 and 111011210106.

It is not an unprimeable number, because it can be changed into a prime (111011211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24246556 + ... + 24251133.

It is an arithmetic number, because the mean of its divisors is an integer number (10669491800).

Almost surely, 2^111011210121 is an apocalyptic number.

It is an amenable number.

111011210121 is a deficient number, since it is larger than the sum of its proper divisors (59700658679).

111011210121 is a wasteful number, since it uses less digits than its factorization.

111011210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497808.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111011210121 its reverse (121012110111), we get a palindrome (232023320232).

The spelling of 111011210121 in words is "one hundred eleven billion, eleven million, two hundred ten thousand, one hundred twenty-one".