211201022200121 has 4 divisors (see below), whose sum is σ = 211428364528500. Its totient is φ = 210973679871744.

The previous prime is 211201022200097. The next prime is 211201022200171. The reversal of 211201022200121 is 121002220102112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56044103760121 + 155156918440000 = 7486261^2 + 12456200^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201022200121 - 2⁶ = 211201022200057 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 211201022200121.

It is not an unprimeable number, because it can be changed into a prime (211201022200171) 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, 113671162796 + ... + 113671164653.

It is an arithmetic number, because the mean of its divisors is an integer number (52857091132125).

Almost surely, 2^{211201022200121} is an apocalyptic number.

It is an amenable number.

211201022200121 is a deficient number, since it is larger than the sum of its proper divisors (227342328379).

211201022200121 is an equidigital number, since it uses as much as digits as its factorization.

211201022200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227342328378.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211201022200121 its reverse (121002220102112), we get a palindrome (332203242302233).

The spelling of 211201022200121 in words is "two hundred eleven trillion, two hundred one billion, twenty-two million, two hundred thousand, one hundred twenty-one".