212120220020011 has 4 divisors (see below), whose sum is σ = 218962807762624. Its totient is φ = 205277632277400.

The previous prime is 212120220020003. The next prime is 212120220020029. The reversal of 212120220020011 is 110020022021212.

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 212120220020011 - 2³ = 212120220020003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120220080011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421293871260 + ... + 3421293871321.

It is an arithmetic number, because the mean of its divisors is an integer number (54740701940656).

Almost surely, 2^{212120220020011} is an apocalyptic number.

212120220020011 is a deficient number, since it is larger than the sum of its proper divisors (6842587742613).

212120220020011 is an equidigital number, since it uses as much as digits as its factorization.

212120220020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842587742612.

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

Adding to 212120220020011 its reverse (110020022021212), we get a palindrome (322140242041223).

The spelling of 212120220020011 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred twenty million, twenty thousand, eleven".