2101221400211 has 4 divisors (see below), whose sum is σ = 2101227408672. Its totient is φ = 2101215391752.

The previous prime is 2101221400177. The next prime is 2101221400259. The reversal of 2101221400211 is 1120041221012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101221400211 - 2¹⁴ = 2101221383827 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 2101221400211.

It is not an unprimeable number, because it can be changed into a prime (2101221400511) 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, 2444960 + ... + 3190653.

It is an arithmetic number, because the mean of its divisors is an integer number (525306852168).

Almost surely, 2^{2101221400211} is an apocalyptic number.

2101221400211 is a deficient number, since it is larger than the sum of its proper divisors (6008461).

2101221400211 is an equidigital number, since it uses as much as digits as its factorization.

2101221400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008460.

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

Adding to 2101221400211 its reverse (1120041221012), we get a palindrome (3221262621223).

The spelling of 2101221400211 in words is "two trillion, one hundred one billion, two hundred twenty-one million, four hundred thousand, two hundred eleven".