211021101220201 has 4 divisors (see below), whose sum is σ = 211021779757012. Its totient is φ = 211020422683392.

The previous prime is 211021101220141. The next prime is 211021101220231. The reversal of 211021101220201 is 102022101120112.

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 168783645288976 + 42237455931225 = 12991676^2 + 6499035^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021101220201 - 2²⁵ = 211021067665769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021101220231) 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, 338801700 + ... + 339423973.

It is an arithmetic number, because the mean of its divisors is an integer number (52755444939253).

Almost surely, 2^{211021101220201} is an apocalyptic number.

It is an amenable number.

211021101220201 is a deficient number, since it is larger than the sum of its proper divisors (678536811).

211021101220201 is an equidigital number, since it uses as much as digits as its factorization.

211021101220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678536810.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211021101220201 its reverse (102022101120112), we get a palindrome (313043202340313).

The spelling of 211021101220201 in words is "two hundred eleven trillion, twenty-one billion, one hundred one million, two hundred twenty thousand, two hundred one".