212102001211 has 4 divisors (see below), whose sum is σ = 212141161512. Its totient is φ = 212062840912.

The previous prime is 212102001187. The next prime is 212102001227. The reversal of 212102001211 is 112100201212.

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

It is a cyclic number.

It is not a de Polignac number, because 212102001211 - 2⁹ = 212102000699 is a prime.

It is a super-2 number, since 2×212102001211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102001191 and 212102001200.

It is not an unprimeable number, because it can be changed into a prime (212102001281) 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, 19572025 + ... + 19582858.

It is an arithmetic number, because the mean of its divisors is an integer number (53035290378).

Almost surely, 2^212102001211 is an apocalyptic number.

212102001211 is a deficient number, since it is larger than the sum of its proper divisors (39160301).

212102001211 is an equidigital number, since it uses as much as digits as its factorization.

212102001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39160300.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212102001211 its reverse (112100201212), we get a palindrome (324202202423).

The spelling of 212102001211 in words is "two hundred twelve billion, one hundred two million, one thousand, two hundred eleven".