2212101011221 has 4 divisors (see below), whose sum is σ = 2226750686944. Its totient is φ = 2197451335500.

The previous prime is 2212101011213. The next prime is 2212101011233. The reversal of 2212101011221 is 1221101012122.

2212101011221 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 2212101011221 - 2³ = 2212101011213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212101011195 and 2212101011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212101011321) 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, 7324837635 + ... + 7324837936.

It is an arithmetic number, because the mean of its divisors is an integer number (556687671736).

Almost surely, 2^{2212101011221} is an apocalyptic number.

It is an amenable number.

2212101011221 is a deficient number, since it is larger than the sum of its proper divisors (14649675723).

2212101011221 is a wasteful number, since it uses less digits than its factorization.

2212101011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649675722.

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

Adding to 2212101011221 its reverse (1221101012122), we get a palindrome (3433202023343).

Subtracting from 2212101011221 its reverse (1221101012122), we obtain a palindrome (990999999099).

The spelling of 2212101011221 in words is "two trillion, two hundred twelve billion, one hundred one million, eleven thousand, two hundred twenty-one".