31123303103 has 2 divisors, whose sum is σ = 31123303104. Its totient is φ = 31123303102.

The previous prime is 31123303069. The next prime is 31123303109. The reversal of 31123303103 is 30130332113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31123303103 - 2¹² = 31123299007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31123303109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561651551 + 15561651552.

It is an arithmetic number, because the mean of its divisors is an integer number (15561651552).

Almost surely, 2^31123303103 is an apocalyptic number.

31123303103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123303103 is an equidigital number, since it uses as much as digits as its factorization.

31123303103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31123303103 its reverse (30130332113), we get a palindrome (61253635216).

The spelling of 31123303103 in words is "thirty-one billion, one hundred twenty-three million, three hundred three thousand, one hundred three".