212100222001 has 12 divisors (see below), whose sum is σ = 223877308404. Its totient is φ = 200913372000.

The previous prime is 212100221987. The next prime is 212100222031. The reversal of 212100222001 is 100222001212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114958293025 + 97141928976 = 339055^2 + 311676^2 .

It is not a de Polignac number, because 212100222001 - 2¹⁹ = 212099697713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212100222031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3544591 + ... + 3603931.

It is an arithmetic number, because the mean of its divisors is an integer number (18656442367).

Almost surely, 2^212100222001 is an apocalyptic number.

It is an amenable number.

212100222001 is a deficient number, since it is larger than the sum of its proper divisors (11777086403).

212100222001 is an equidigital number, since it uses as much as digits as its factorization.

212100222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69280 (or 69261 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212100222001 its reverse (100222001212), we get a palindrome (312322223213).

The spelling of 212100222001 in words is "two hundred twelve billion, one hundred million, two hundred twenty-two thousand, one".