212121212222001 has 8 divisors (see below), whose sum is σ = 282935131587904. Its totient is φ = 141360717168720.

The previous prime is 212121212221939. The next prime is 212121212222039. The reversal of 212121212222001 is 100222212121212.

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

It is not a de Polignac number, because 212121212222001 - 2⁹ = 212121212221489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121212222041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13356068890 + ... + 13356084771.

It is an arithmetic number, because the mean of its divisors is an integer number (35366891448488).

Almost surely, 2^{212121212222001} is an apocalyptic number.

It is an amenable number.

212121212222001 is a deficient number, since it is larger than the sum of its proper divisors (70813919365903).

212121212222001 is a wasteful number, since it uses less digits than its factorization.

212121212222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26712156311.

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

Adding to 212121212222001 its reverse (100222212121212), we get a palindrome (312343424343213).

The spelling of 212121212222001 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one".