31201012019 has 2 divisors, whose sum is σ = 31201012020. Its totient is φ = 31201012018.

The previous prime is 31201011991. The next prime is 31201012039. The reversal of 31201012019 is 91021010213.

It is an a-pointer prime, because the next prime (31201012039) can be obtained adding 31201012019 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201012019 is a prime.

It is a super-2 number, since 2×31201012019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31201012039) 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, 15600506009 + 15600506010.

It is an arithmetic number, because the mean of its divisors is an integer number (15600506010).

Almost surely, 2^31201012019 is an apocalyptic number.

31201012019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201012019 is an equidigital number, since it uses as much as digits as its factorization.

31201012019 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 20.

The spelling of 31201012019 in words is "thirty-one billion, two hundred one million, twelve thousand, nineteen".