211211222222201 has 16 divisors (see below), whose sum is σ = 219068024697600. Its totient is φ = 203392843129728.

The previous prime is 211211222222173. The next prime is 211211222222251. The reversal of 211211222222201 is 102222222112112.

It is a cyclic number.

It is not a de Polignac number, because 211211222222201 - 2⁶ = 211211222222137 is a prime.

It is a super-2 number, since 2×211211222222201² (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 (211211222222251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64382240 + ... + 67583246.

It is an arithmetic number, because the mean of its divisors is an integer number (13691751543600).

Almost surely, 2^{211211222222201} is an apocalyptic number.

It is an amenable number.

211211222222201 is a deficient number, since it is larger than the sum of its proper divisors (7856802475399).

211211222222201 is a wasteful number, since it uses less digits than its factorization.

211211222222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207008.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211211222222201 its reverse (102222222112112), we get a palindrome (313433444334313).

The spelling of 211211222222201 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred one".