212122101211 has 4 divisors (see below), whose sum is σ = 213741354024. Its totient is φ = 210502848400.

The previous prime is 212122101167. The next prime is 212122101229. The reversal of 212122101211 is 112101221212.

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 212122101211 - 2⁹ = 212122100699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122101011) 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, 809626210 + ... + 809626471.

It is an arithmetic number, because the mean of its divisors is an integer number (53435338506).

Almost surely, 2^212122101211 is an apocalyptic number.

212122101211 is a deficient number, since it is larger than the sum of its proper divisors (1619252813).

212122101211 is a wasteful number, since it uses less digits than its factorization.

212122101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619252812.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212122101211 its reverse (112101221212), we get a palindrome (324223322423).

The spelling of 212122101211 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred one thousand, two hundred eleven".