121311230011 has 2 divisors, whose sum is σ = 121311230012. Its totient is φ = 121311230010.

The previous prime is 121311230009. The next prime is 121311230063. The reversal of 121311230011 is 110032113121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121311230011 - 2¹ = 121311230009 is a prime.

Together with 121311230009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121311210011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655615005 + 60655615006.

It is an arithmetic number, because the mean of its divisors is an integer number (60655615006).

Almost surely, 2^121311230011 is an apocalyptic number.

121311230011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311230011 is an equidigital number, since it uses as much as digits as its factorization.

121311230011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121311230011 its reverse (110032113121), we get a palindrome (231343343132).

The spelling of 121311230011 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred thirty thousand, eleven".