213122012611 has 2 divisors, whose sum is σ = 213122012612. Its totient is φ = 213122012610.

The previous prime is 213122012591. The next prime is 213122012633. The reversal of 213122012611 is 116210221312.

It is an a-pointer prime, because the next prime (213122012633) can be obtained adding 213122012611 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213122012611 - 2⁷ = 213122012483 is a prime.

It is not a weakly prime, because it can be changed into another prime (213122012681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561006305 + 106561006306.

It is an arithmetic number, because the mean of its divisors is an integer number (106561006306).

Almost surely, 2^213122012611 is an apocalyptic number.

213122012611 is a deficient number, since it is larger than the sum of its proper divisors (1).

213122012611 is an equidigital number, since it uses as much as digits as its factorization.

213122012611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 213122012611 its reverse (116210221312), we get a palindrome (329332233923).

The spelling of 213122012611 in words is "two hundred thirteen billion, one hundred twenty-two million, twelve thousand, six hundred eleven".