211222100120221 has 4 divisors (see below), whose sum is σ = 212389073049244. Its totient is φ = 210055127191200.

The previous prime is 211222100120219. The next prime is 211222100120293. The reversal of 211222100120221 is 122021001222112.

211222100120221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7463747504196 + 203758352616025 = 2731986^2 + 14274395^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222100120221 - 2¹ = 211222100120219 is a prime.

It is a super-2 number, since 2×211222100120221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222100126221) 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, 583486464240 + ... + 583486464601.

It is an arithmetic number, because the mean of its divisors is an integer number (53097268262311).

Almost surely, 2^{211222100120221} is an apocalyptic number.

It is an amenable number.

211222100120221 is a deficient number, since it is larger than the sum of its proper divisors (1166972929023).

211222100120221 is a wasteful number, since it uses less digits than its factorization.

211222100120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166972929022.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211222100120221 its reverse (122021001222112), we get a palindrome (333243101342333).

The spelling of 211222100120221 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".