12121022311 has 2 divisors, whose sum is σ = 12121022312. Its totient is φ = 12121022310.

The previous prime is 12121022299. The next prime is 12121022339. The reversal of 12121022311 is 11322012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12121022311 - 2⁹ = 12121021799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121022341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060511155 + 6060511156.

It is an arithmetic number, because the mean of its divisors is an integer number (6060511156).

Almost surely, 2^12121022311 is an apocalyptic number.

12121022311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121022311 is an equidigital number, since it uses as much as digits as its factorization.

12121022311 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 12121022311 its reverse (11322012121), we get a palindrome (23443034432).

The spelling of 12121022311 in words is "twelve billion, one hundred twenty-one million, twenty-two thousand, three hundred eleven".