211101200012121 has 16 divisors (see below), whose sum is σ = 282897998342784. Its totient is φ = 140019272354304.

The previous prime is 211101200012089. The next prime is 211101200012123. The reversal of 211101200012121 is 121210002101112.

It is a happy number.

It is not a de Polignac number, because 211101200012121 - 2⁵ = 211101200012089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211101200012121.

It is not an unprimeable number, because it can be changed into a prime (211101200012123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300836745 + ... + 301537641.

It is an arithmetic number, because the mean of its divisors is an integer number (17681124896424).

Almost surely, 2^{211101200012121} is an apocalyptic number.

It is an amenable number.

211101200012121 is a deficient number, since it is larger than the sum of its proper divisors (71796798330663).

211101200012121 is a wasteful number, since it uses less digits than its factorization.

211101200012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210720.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211101200012121 its reverse (121210002101112), we get a palindrome (332311202113233).

The spelling of 211101200012121 in words is "two hundred eleven trillion, one hundred one billion, two hundred million, twelve thousand, one hundred twenty-one".