121112011211211 has 24 divisors (see below), whose sum is σ = 179689532383920. Its totient is φ = 78549582396096.

The previous prime is 121112011211179. The next prime is 121112011211273. The reversal of 121112011211211 is 112112110211121.

121112011211211 is a `hidden beast` number, since 1 + 211 + 1 + 20 + 11 + 211 + 211 = 666.

It is not a de Polignac number, because 121112011211211 - 2⁵ = 121112011211179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121112011211311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19388620 + ... + 24862473.

It is an arithmetic number, because the mean of its divisors is an integer number (7487063849330).

Almost surely, 2^{121112011211211} is an apocalyptic number.

121112011211211 is a deficient number, since it is larger than the sum of its proper divisors (58577521172709).

121112011211211 is a wasteful number, since it uses less digits than its factorization.

121112011211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44259355 (or 44259352 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121112011211211 its reverse (112112110211121), we get a palindrome (233224121422332).

The spelling of 121112011211211 in words is "one hundred twenty-one trillion, one hundred twelve billion, eleven million, two hundred eleven thousand, two hundred eleven".