31121063 has 2 divisors, whose sum is σ = 31121064. Its totient is φ = 31121062.

The previous prime is 31121059. The next prime is 31121081. The reversal of 31121063 is 36012113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31121063 - 2² = 31121059 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31121663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560531 + 15560532.

It is an arithmetic number, because the mean of its divisors is an integer number (15560532).

Almost surely, 2^31121063 is an apocalyptic number.

31121063 is a deficient number, since it is larger than the sum of its proper divisors (1).

31121063 is an equidigital number, since it uses as much as digits as its factorization.

31121063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31121063 is about 5578.6255475699. The cubic root of 31121063 is about 314.5464641361.

Adding to 31121063 its reverse (36012113), we get a palindrome (67133176).

The spelling of 31121063 in words is "thirty-one million, one hundred twenty-one thousand, sixty-three".