211202220111121 has 4 divisors (see below), whose sum is σ = 213176072635632. Its totient is φ = 209228367586612.

The previous prime is 211202220111097. The next prime is 211202220111137. The reversal of 211202220111121 is 121111022202112.

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 211202220111121 - 2³⁵ = 211167860372753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211202290111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986926262095 + ... + 986926262308.

It is an arithmetic number, because the mean of its divisors is an integer number (53294018158908).

Almost surely, 2^{211202220111121} is an apocalyptic number.

It is an amenable number.

211202220111121 is a deficient number, since it is larger than the sum of its proper divisors (1973852524511).

211202220111121 is a wasteful number, since it uses less digits than its factorization.

211202220111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973852524510.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211202220111121 its reverse (121111022202112), we get a palindrome (332313242313233).

The spelling of 211202220111121 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty-one".