212120131211 has 4 divisors (see below), whose sum is σ = 212122608312. Its totient is φ = 212117654112.

The previous prime is 212120131121. The next prime is 212120131247. The reversal of 212120131211 is 112131021212.

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 212120131211 - 2¹⁴ = 212120114827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212120131211.

It is not an unprimeable number, because it can be changed into a prime (212120131511) 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, 1105325 + ... + 1282958.

It is an arithmetic number, because the mean of its divisors is an integer number (53030652078).

Almost surely, 2^212120131211 is an apocalyptic number.

212120131211 is a deficient number, since it is larger than the sum of its proper divisors (2477101).

212120131211 is an equidigital number, since it uses as much as digits as its factorization.

212120131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477100.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212120131211 its reverse (112131021212), we get a palindrome (324251152423).

The spelling of 212120131211 in words is "two hundred twelve billion, one hundred twenty million, one hundred thirty-one thousand, two hundred eleven".