2211000021221 has 4 divisors (see below), whose sum is σ = 2258042574912. Its totient is φ = 2163957467532.

The previous prime is 2211000021157. The next prime is 2211000021253. The reversal of 2211000021221 is 1221200001122.

2211000021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2211000021221 - 2⁶ = 2211000021157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211000021196 and 2211000021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211000021271) 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, 23521276775 + ... + 23521276868.

It is an arithmetic number, because the mean of its divisors is an integer number (564510643728).

Almost surely, 2^{2211000021221} is an apocalyptic number.

It is an amenable number.

2211000021221 is a deficient number, since it is larger than the sum of its proper divisors (47042553691).

2211000021221 is an equidigital number, since it uses as much as digits as its factorization.

2211000021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47042553690.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2211000021221 its reverse (1221200001122), we get a palindrome (3432200022343).

The spelling of 2211000021221 in words is "two trillion, two hundred eleven billion, twenty-one thousand, two hundred twenty-one".