121112211210211 has 6 divisors (see below), whose sum is σ = 131145175452660. Its totient is φ = 111795887270808.

The previous prime is 121112211210209. The next prime is 121112211210223. The reversal of 121112211210211 is 112012112211121.

It is not a de Polignac number, because 121112211210211 - 2¹ = 121112211210209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112211210251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358320151341 + ... + 358320151678.

It is an arithmetic number, because the mean of its divisors is an integer number (21857529242110).

Almost surely, 2^{121112211210211} is an apocalyptic number.

121112211210211 is a deficient number, since it is larger than the sum of its proper divisors (10032964242449).

121112211210211 is an equidigital number, since it uses as much as digits as its factorization.

121112211210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716640303045 (or 716640303032 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121112211210211 its reverse (112012112211121), we get a palindrome (233124323421332).

The spelling of 121112211210211 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred eleven million, two hundred ten thousand, two hundred eleven".