121221021101211 has 32 divisors (see below), whose sum is σ = 189388054284800. Its totient is φ = 76419127827360.

The previous prime is 121221021101209. The next prime is 121221021101237. The reversal of 121221021101211 is 112101120122121.

It is a happy number.

121221021101211 is a `hidden beast` number, since 1 + 21 + 221 + 0 + 211 + 0 + 1 + 211 = 666.

It is not a de Polignac number, because 121221021101211 - 2¹ = 121221021101209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221021101261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218112751 + ... + 218667816.

It is an arithmetic number, because the mean of its divisors is an integer number (5918376696400).

Almost surely, 2^{121221021101211} is an apocalyptic number.

121221021101211 is a deficient number, since it is larger than the sum of its proper divisors (68167033183589).

121221021101211 is a wasteful number, since it uses less digits than its factorization.

121221021101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436781136 (or 436781130 counting only the distinct ones).

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

Adding to 121221021101211 its reverse (112101120122121), we get a palindrome (233322141223332).

The spelling of 121221021101211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred one thousand, two hundred eleven".