212211100001 has 4 divisors (see below), whose sum is σ = 212234987712. Its totient is φ = 212187212292.

The previous prime is 212211099953. The next prime is 212211100019. The reversal of 212211100001 is 100001112212.

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 not a de Polignac number, because 212211100001 - 2¹⁸ = 212210837857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212211100051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11930525 + ... + 11948298.

It is an arithmetic number, because the mean of its divisors is an integer number (53058746928).

Almost surely, 2^212211100001 is an apocalyptic number.

It is an amenable number.

212211100001 is a deficient number, since it is larger than the sum of its proper divisors (23887711).

212211100001 is an equidigital number, since it uses as much as digits as its factorization.

212211100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23887710.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212211100001 its reverse (100001112212), we get a palindrome (312212212213).

The spelling of 212211100001 in words is "two hundred twelve billion, two hundred eleven million, one hundred thousand, one".