121221201101211 has 12 divisors (see below), whose sum is σ = 175097395680480. Its totient is φ = 80814085513200.

The previous prime is 121221201101159. The next prime is 121221201101233. The reversal of 121221201101211 is 112101102122121.

It is a happy number.

121221201101211 is a `hidden beast` number, since 1 + 21 + 221 + 201 + 10 + 1 + 211 = 666.

It is not a de Polignac number, because 121221201101211 - 2¹⁰ = 121221201100187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221201101291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18207361 + ... + 23957261.

It is an arithmetic number, because the mean of its divisors is an integer number (14591449640040).

Almost surely, 2^{121221201101211} is an apocalyptic number.

121221201101211 is a deficient number, since it is larger than the sum of its proper divisors (53876194579269).

121221201101211 is a wasteful number, since it uses less digits than its factorization.

121221201101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8092386 (or 8092383 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121221201101211 its reverse (112101102122121), we get a palindrome (233322303223332).

The spelling of 121221201101211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, two hundred eleven".