212221012001 has 4 divisors (see below), whose sum is σ = 213491796672. Its totient is φ = 210950227332.

The previous prime is 212221011991. The next prime is 212221012009. The reversal of 212221012001 is 100210122212.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221012001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221012009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635392085 + ... + 635392418.

It is an arithmetic number, because the mean of its divisors is an integer number (53372949168).

Almost surely, 2^212221012001 is an apocalyptic number.

It is an amenable number.

212221012001 is a deficient number, since it is larger than the sum of its proper divisors (1270784671).

212221012001 is a wasteful number, since it uses less digits than its factorization.

212221012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270784670.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212221012001 its reverse (100210122212), we get a palindrome (312431134213).

The spelling of 212221012001 in words is "two hundred twelve billion, two hundred twenty-one million, twelve thousand, one".