1213110131011 has 2 divisors, whose sum is σ = 1213110131012. Its totient is φ = 1213110131010.

The previous prime is 1213110131003. The next prime is 1213110131029. The reversal of 1213110131011 is 1101310113121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213110131011 - 2³ = 1213110131003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213110132011) 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, 606555065505 + 606555065506.

It is an arithmetic number, because the mean of its divisors is an integer number (606555065506).

Almost surely, 2^{1213110131011} is an apocalyptic number.

1213110131011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213110131011 is an equidigital number, since it uses as much as digits as its factorization.

1213110131011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1213110131011 its reverse (1101310113121), we get a palindrome (2314420244132).

The spelling of 1213110131011 in words is "one trillion, two hundred thirteen billion, one hundred ten million, one hundred thirty-one thousand, eleven".