211111022020121 has 8 divisors (see below), whose sum is σ = 217933347340800. Its totient is φ = 204289464971520.

The previous prime is 211111022020103. The next prime is 211111022020163. The reversal of 211111022020121 is 121020220111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111022020121 - 2³⁰ = 211109948278297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111022020121.

It is not an unprimeable number, because it can be changed into a prime (211111022010121) 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 7 ways as a sum of consecutive naturals, for example, 191509541 + ... + 192608738.

It is an arithmetic number, because the mean of its divisors is an integer number (27241668417600).

Almost surely, 2^{211111022020121} is an apocalyptic number.

It is an amenable number.

211111022020121 is a deficient number, since it is larger than the sum of its proper divisors (6822325320679).

211111022020121 is a wasteful number, since it uses less digits than its factorization.

211111022020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384136039.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211111022020121 its reverse (121020220111112), we get a palindrome (332131242131233).

The spelling of 211111022020121 in words is "two hundred eleven trillion, one hundred eleven billion, twenty-two million, twenty thousand, one hundred twenty-one".