212211120021101 has 4 divisors (see below), whose sum is σ = 212211300059772. Its totient is φ = 212210939982432.

The previous prime is 212211120021091. The next prime is 212211120021143. The reversal of 212211120021101 is 101120021112212.

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 199317641640100 + 12893478381001 = 14117990^2 + 3590749^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211120021101 - 2²⁶ = 212211052912237 is a prime.

It is a super-2 number, since 2×212211120021101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212211120021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211120021151) 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, 88239560 + ... + 90612593.

It is an arithmetic number, because the mean of its divisors is an integer number (53052825014943).

Almost surely, 2^{212211120021101} is an apocalyptic number.

It is an amenable number.

212211120021101 is a deficient number, since it is larger than the sum of its proper divisors (180038671).

212211120021101 is a wasteful number, since it uses less digits than its factorization.

212211120021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180038670.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212211120021101 its reverse (101120021112212), we get a palindrome (313331141133313).

The spelling of 212211120021101 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred twenty million, twenty-one thousand, one hundred one".