211212111122201 has 16 divisors (see below), whose sum is σ = 245947223750400. Its totient is φ = 177617695714368.

The previous prime is 211212111122039. The next prime is 211212111122219. The reversal of 211212111122201 is 102221111212112.

It is a happy number.

It is not a de Polignac number, because 211212111122201 - 2¹⁸ = 211212110860057 is a prime.

It is a super-2 number, since 2×211212111122201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212111122231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3483380 + ... + 20846058.

It is an arithmetic number, because the mean of its divisors is an integer number (15371701484400).

Almost surely, 2^{211212111122201} is an apocalyptic number.

It is an amenable number.

211212111122201 is a deficient number, since it is larger than the sum of its proper divisors (34735112628199).

211212111122201 is a wasteful number, since it uses less digits than its factorization.

211212111122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17395528.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211212111122201 its reverse (102221111212112), we get a palindrome (313433222334313).

The spelling of 211212111122201 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred one".