211121221111201 has 4 divisors (see below), whose sum is σ = 222232864327600. Its totient is φ = 200009577894804.

The previous prime is 211121221111193. The next prime is 211121221111217. The reversal of 211121221111201 is 102111122121112.

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 211121221111201 - 2³ = 211121221111193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11111643216379 = 211121221111201 / (2 + 1 + 1 + 1 + 2 + 1 + 2 + 2 + 1 + 1 + 1 + 1 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121221111231) 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, 5555821608171 + ... + 5555821608208.

It is an arithmetic number, because the mean of its divisors is an integer number (55558216081900).

Almost surely, 2^{211121221111201} is an apocalyptic number.

It is an amenable number.

211121221111201 is a deficient number, since it is larger than the sum of its proper divisors (11111643216399).

211121221111201 is a wasteful number, since it uses less digits than its factorization.

211121221111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111643216398.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211121221111201 its reverse (102111122121112), we get a palindrome (313232343232313).

The spelling of 211121221111201 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred one".