2211421022221 has 4 divisors (see below), whose sum is σ = 2214413473600. Its totient is φ = 2208428570844.

The previous prime is 2211421022207. The next prime is 2211421022227. The reversal of 2211421022221 is 1222201241122.

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 2211421022221 - 2¹⁹ = 2211420497933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211421022192 and 2211421022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211421022227) 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, 1496224581 + ... + 1496226058.

It is an arithmetic number, because the mean of its divisors is an integer number (553603368400).

Almost surely, 2^{2211421022221} is an apocalyptic number.

It is an amenable number.

2211421022221 is a deficient number, since it is larger than the sum of its proper divisors (2992451379).

2211421022221 is an equidigital number, since it uses as much as digits as its factorization.

2211421022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992451378.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 2211421022221 its reverse (1222201241122), we get a palindrome (3433622263343).

The spelling of 2211421022221 in words is "two trillion, two hundred eleven billion, four hundred twenty-one million, twenty-two thousand, two hundred twenty-one".