211212111201 has 24 divisors (see below), whose sum is σ = 352793859264. Its totient is φ = 111408585120.

The previous prime is 211212111199. The next prime is 211212111217. The reversal of 211212111201 is 102111212112.

It is a happy number.

It is not a de Polignac number, because 211212111201 - 2¹ = 211212111199 is a prime.

It is a super-2 number, since 2×211212111201² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212111251) 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 23 ways as a sum of consecutive naturals, for example, 55260285 + ... + 55264106.

It is an arithmetic number, because the mean of its divisors is an integer number (14699744136).

Almost surely, 2^211212111201 is an apocalyptic number.

211212111201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211212111201 is a deficient number, since it is larger than the sum of its proper divisors (141581748063).

211212111201 is a wasteful number, since it uses less digits than its factorization.

211212111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110524421 (or 110524414 counting only the distinct ones).

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

Adding to 211212111201 its reverse (102111212112), we get a palindrome (313323323313).

The spelling of 211212111201 in words is "two hundred eleven billion, two hundred twelve million, one hundred eleven thousand, two hundred one".