211212011211201 has 192 divisors, whose sum is σ = 415723154595840. Its totient is φ = 99783014123520.

The previous prime is 211212011211151. The next prime is 211212011211241. The reversal of 211212011211201 is 102112110212112.

It is a happy number.

211212011211201 is a `hidden beast` number, since 21 + 121 + 201 + 121 + 1 + 201 = 666.

It is not a de Polignac number, because 211212011211201 - 2⁶ = 211212011211137 is a prime.

It is a super-4 number, since 4×211212011211201⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (211212011211241) 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 191 ways as a sum of consecutive naturals, for example, 169387660 + ... + 170630018.

It is an arithmetic number, because the mean of its divisors is an integer number (2165224763520).

Almost surely, 2^{211212011211201} is an apocalyptic number.

211212011211201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211212011211201 is a deficient number, since it is larger than the sum of its proper divisors (204511143384639).

211212011211201 is a wasteful number, since it uses less digits than its factorization.

211212011211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242676 (or 1242673 counting only the distinct ones).

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

Adding to 211212011211201 its reverse (102112110212112), we get a palindrome (313324121423313).

The spelling of 211212011211201 in words is "two hundred eleven trillion, two hundred twelve billion, eleven million, two hundred eleven thousand, two hundred one".