212212221001 has 16 divisors (see below), whose sum is σ = 235647921600. Its totient is φ = 189494009920.

The previous prime is 212212220993. The next prime is 212212221019. The reversal of 212212221001 is 100122212212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212212221001 - 2³ = 212212220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212212221401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513826 + ... + 829723.

It is an arithmetic number, because the mean of its divisors is an integer number (14727995100).

Almost surely, 2^212212221001 is an apocalyptic number.

It is an amenable number.

212212221001 is a deficient number, since it is larger than the sum of its proper divisors (23435700599).

212212221001 is a wasteful number, since it uses less digits than its factorization.

212212221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343816.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212212221001 its reverse (100122212212), we get a palindrome (312334433213).

The spelling of 212212221001 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, one".