211111000021201 has 4 divisors (see below), whose sum is σ = 241269714309952. Its totient is φ = 180952285732452.

The previous prime is 211111000021189. The next prime is 211111000021231. The reversal of 211111000021201 is 102120000111112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211111000021201 - 2⁵ = 211111000021169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211111000021231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15079357144365 + ... + 15079357144378.

It is an arithmetic number, because the mean of its divisors is an integer number (60317428577488).

Almost surely, 2^{211111000021201} is an apocalyptic number.

It is an amenable number.

211111000021201 is a deficient number, since it is larger than the sum of its proper divisors (30158714288751).

211111000021201 is an equidigital number, since it uses as much as digits as its factorization.

211111000021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30158714288750.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211111000021201 its reverse (102120000111112), we get a palindrome (313231000132313).

The spelling of 211111000021201 in words is "two hundred eleven trillion, one hundred eleven billion, twenty-one thousand, two hundred one".