211212200121 has 16 divisors (see below), whose sum is σ = 303327150336. Its totient is φ = 129956126976.

The previous prime is 211212200113. The next prime is 211212200123. The reversal of 211212200121 is 121002212112.

211212200121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211212200121 - 2³ = 211212200113 is a prime.

It is a super-2 number, since 2×211212200121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212200121.

It is not an unprimeable number, because it can be changed into a prime (211212200123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178465 + ... + 673998.

It is an arithmetic number, because the mean of its divisors is an integer number (18957946896).

Almost surely, 2^211212200121 is an apocalyptic number.

It is an amenable number.

211212200121 is a deficient number, since it is larger than the sum of its proper divisors (92114950215).

211212200121 is a wasteful number, since it uses less digits than its factorization.

211212200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858832.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211212200121 its reverse (121002212112), we get a palindrome (332214412233).

The spelling of 211212200121 in words is "two hundred eleven billion, two hundred twelve million, two hundred thousand, one hundred twenty-one".