121112102012021 has 8 divisors (see below), whose sum is σ = 121191502833240. Its totient is φ = 121032703014912.

The previous prime is 121112102012003. The next prime is 121112102012047. The reversal of 121112102012021 is 120210201211121.

It can be written as a sum of positive squares in 4 ways, for example, as 9497398786225 + 111614703225796 = 3081785^2 + 10564786^2 .

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 121112102012021 - 2³⁴ = 121094922142837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112102012081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148234895 + ... + 149049683.

It is an arithmetic number, because the mean of its divisors is an integer number (15148937854155).

Almost surely, 2^{121112102012021} is an apocalyptic number.

It is an amenable number.

121112102012021 is a deficient number, since it is larger than the sum of its proper divisors (79400821219).

121112102012021 is an equidigital number, since it uses as much as digits as its factorization.

121112102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912055.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121112102012021 its reverse (120210201211121), we get a palindrome (241322303223142).

The spelling of 121112102012021 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred two million, twelve thousand, twenty-one".