311121232403 has 2 divisors, whose sum is σ = 311121232404. Its totient is φ = 311121232402.

The previous prime is 311121232351. The next prime is 311121232427. The reversal of 311121232403 is 304232121113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311121232403 - 2²⁶ = 311054123539 is a prime.

It is not a weakly prime, because it can be changed into another prime (311121292403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560616201 + 155560616202.

It is an arithmetic number, because the mean of its divisors is an integer number (155560616202).

Almost surely, 2^311121232403 is an apocalyptic number.

311121232403 is a deficient number, since it is larger than the sum of its proper divisors (1).

311121232403 is an equidigital number, since it uses as much as digits as its factorization.

311121232403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 311121232403 its reverse (304232121113), we get a palindrome (615353353516).

The spelling of 311121232403 in words is "three hundred eleven billion, one hundred twenty-one million, two hundred thirty-two thousand, four hundred three".