212121012222201 has 8 divisors (see below), whose sum is σ = 283073313799840. Its totient is φ = 141291359396352.

The previous prime is 212121012222187. The next prime is 212121012222269. The reversal of 212121012222201 is 102222210121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212121012222201 - 2⁵ = 212121012222169 is a prime.

It is a super-3 number, since 3×212121012222201³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121012222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30662183911 + ... + 30662190828.

It is an arithmetic number, because the mean of its divisors is an integer number (35384164224980).

Almost surely, 2^{212121012222201} is an apocalyptic number.

It is an amenable number.

212121012222201 is a deficient number, since it is larger than the sum of its proper divisors (70952301577639).

212121012222201 is a wasteful number, since it uses less digits than its factorization.

212121012222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61324375895.

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

Adding to 212121012222201 its reverse (102222210121212), we get a palindrome (314343222343413).

The spelling of 212121012222201 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred one".