212020221211 has 4 divisors (see below), whose sum is σ = 214119431424. Its totient is φ = 209921011000.

The previous prime is 212020221173. The next prime is 212020221227. The reversal of 212020221211 is 112122020212.

It is a happy number.

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 212020221211 - 2¹³ = 212020213019 is a prime.

It is a super-2 number, since 2×212020221211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212060221211) 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, 1049604955 + ... + 1049605156.

It is an arithmetic number, because the mean of its divisors is an integer number (53529857856).

Almost surely, 2^212020221211 is an apocalyptic number.

212020221211 is a deficient number, since it is larger than the sum of its proper divisors (2099210213).

212020221211 is a wasteful number, since it uses less digits than its factorization.

212020221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099210212.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212020221211 its reverse (112122020212), we get a palindrome (324142241423).

The spelling of 212020221211 in words is "two hundred twelve billion, twenty million, two hundred twenty-one thousand, two hundred eleven".