111211020112121 has 8 divisors (see below), whose sum is σ = 112621396821120. Its totient is φ = 109800709460208.

The previous prime is 111211020112117. The next prime is 111211020112147. The reversal of 111211020112121 is 121211020112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111211020112121 - 2² = 111211020112117 is a prime.

It is a super-2 number, since 2×111211020112121² (a number of 29 digits) contains 22 as substring.

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 111211020112121.

It is not an unprimeable number, because it can be changed into a prime (111211020114121) 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 7 ways as a sum of consecutive naturals, for example, 13121411 + ... + 19864376.

It is an arithmetic number, because the mean of its divisors is an integer number (14077674602640).

Almost surely, 2^{111211020112121} is an apocalyptic number.

It is an amenable number.

111211020112121 is a deficient number, since it is larger than the sum of its proper divisors (1410376708999).

111211020112121 is an equidigital number, since it uses as much as digits as its factorization.

111211020112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33028543.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111211020112121 its reverse (121211020112111), we get a palindrome (232422040224232).

The spelling of 111211020112121 in words is "one hundred eleven trillion, two hundred eleven billion, twenty million, one hundred twelve thousand, one hundred twenty-one".