211222102220121 has 4 divisors (see below), whose sum is σ = 281629469626832. Its totient is φ = 140814734813412.

The previous prime is 211222102220111. The next prime is 211222102220167. The reversal of 211222102220121 is 121022201222112.

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 not a de Polignac number, because 211222102220121 - 2¹⁵ = 211222102187353 is a prime.

It is a super-2 number, since 2×211222102220121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211222102220111) 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, 35203683703351 + ... + 35203683703356.

It is an arithmetic number, because the mean of its divisors is an integer number (70407367406708).

Almost surely, 2^{211222102220121} is an apocalyptic number.

It is an amenable number.

211222102220121 is a deficient number, since it is larger than the sum of its proper divisors (70407367406711).

211222102220121 is an equidigital number, since it uses as much as digits as its factorization.

211222102220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407367406710.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211222102220121 its reverse (121022201222112), we get a palindrome (332244303442233).

The spelling of 211222102220121 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred two million, two hundred twenty thousand, one hundred twenty-one".