212120103311 has 2 divisors, whose sum is σ = 212120103312. Its totient is φ = 212120103310.

The previous prime is 212120103271. The next prime is 212120103313. The reversal of 212120103311 is 113301021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212120103311 - 2²² = 212115909007 is a prime.

Together with 212120103313, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212120103311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120103313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060051655 + 106060051656.

It is an arithmetic number, because the mean of its divisors is an integer number (106060051656).

Almost surely, 2^212120103311 is an apocalyptic number.

212120103311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120103311 is an equidigital number, since it uses as much as digits as its factorization.

212120103311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212120103311 its reverse (113301021212), we get a palindrome (325421124523).

The spelling of 212120103311 in words is "two hundred twelve billion, one hundred twenty million, one hundred three thousand, three hundred eleven".