213122012011 has 2 divisors, whose sum is σ = 213122012012. Its totient is φ = 213122012010.

The previous prime is 213122011979. The next prime is 213122012063. The reversal of 213122012011 is 110210221312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213122012011 - 2⁵ = 213122011979 is a prime.

It is not a weakly prime, because it can be changed into another prime (213122012611) 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 as a sum of consecutive naturals, namely, 106561006005 + 106561006006.

It is an arithmetic number, because the mean of its divisors is an integer number (106561006006).

Almost surely, 2^213122012011 is an apocalyptic number.

213122012011 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122012011 is an equidigital number, since it uses as much as digits as its factorization.

213122012011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213122012011 its reverse (110210221312), we get a palindrome (323332233323).

The spelling of 213122012011 in words is "two hundred thirteen billion, one hundred twenty-two million, twelve thousand, eleven".