212211022202101 has 4 divisors (see below), whose sum is σ = 228534946986892. Its totient is φ = 195887097417312.

The previous prime is 212211022202087. The next prime is 212211022202107. The reversal of 212211022202101 is 101202220112212.

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 43309547838001 + 168901474364100 = 6580999^2 + 12996210^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211022202101 - 2⁷ = 212211022201973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211022202107) 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, 8161962392376 + ... + 8161962392401.

It is an arithmetic number, because the mean of its divisors is an integer number (57133736746723).

Almost surely, 2^{212211022202101} is an apocalyptic number.

It is an amenable number.

212211022202101 is a deficient number, since it is larger than the sum of its proper divisors (16323924784791).

212211022202101 is a wasteful number, since it uses less digits than its factorization.

212211022202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16323924784790.

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

Adding to 212211022202101 its reverse (101202220112212), we get a palindrome (313413242314313).

The spelling of 212211022202101 in words is "two hundred twelve trillion, two hundred eleven billion, twenty-two million, two hundred two thousand, one hundred one".