121211011100211 has 16 divisors (see below), whose sum is σ = 171138040295328. Its totient is φ = 76046584256000.

The previous prime is 121211011100191. The next prime is 121211011100219. The reversal of 121211011100211 is 112001110112121.

It is a cyclic number.

It is not a de Polignac number, because 121211011100211 - 2³¹ = 121208863616563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211011100219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114836580 + ... + 115887281.

It is an arithmetic number, because the mean of its divisors is an integer number (10696127518458).

Almost surely, 2^{121211011100211} is an apocalyptic number.

121211011100211 is a deficient number, since it is larger than the sum of its proper divisors (49927029195117).

121211011100211 is a wasteful number, since it uses less digits than its factorization.

121211011100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230734182.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121211011100211 its reverse (112001110112121), we get a palindrome (233212121212332).

The spelling of 121211011100211 in words is "one hundred twenty-one trillion, two hundred eleven billion, eleven million, one hundred thousand, two hundred eleven".