1203231101911 has 2 divisors, whose sum is σ = 1203231101912. Its totient is φ = 1203231101910.

The previous prime is 1203231101909. The next prime is 1203231102037. The reversal of 1203231101911 is 1191011323021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1203231101911 - 2¹ = 1203231101909 is a prime.

Together with 1203231101909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203231141911) 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, 601615550955 + 601615550956.

It is an arithmetic number, because the mean of its divisors is an integer number (601615550956).

Almost surely, 2^{1203231101911} is an apocalyptic number.

1203231101911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203231101911 is an equidigital number, since it uses as much as digits as its factorization.

1203231101911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 1203231101911 its reverse (1191011323021), we get a palindrome (2394242424932).

The spelling of 1203231101911 in words is "one trillion, two hundred three billion, two hundred thirty-one million, one hundred one thousand, nine hundred eleven".