212221201001 has 4 divisors (see below), whose sum is σ = 214409048532. Its totient is φ = 210033353472.

The previous prime is 212221200991. The next prime is 212221201007. The reversal of 212221201001 is 100102122212.

212221201001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50198850601 + 162022350400 = 224051^2 + 402520^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221201001 - 2²² = 212217006697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221201007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093923620 + ... + 1093923813.

It is an arithmetic number, because the mean of its divisors is an integer number (53602262133).

Almost surely, 2^212221201001 is an apocalyptic number.

It is an amenable number.

212221201001 is a deficient number, since it is larger than the sum of its proper divisors (2187847531).

212221201001 is an equidigital number, since it uses as much as digits as its factorization.

212221201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187847530.

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

Adding to 212221201001 its reverse (100102122212), we get a palindrome (312323323213).

The spelling of 212221201001 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, one".