31201020143 has 2 divisors, whose sum is σ = 31201020144. Its totient is φ = 31201020142.

The previous prime is 31201020079. The next prime is 31201020173. The reversal of 31201020143 is 34102010213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31201020143 - 2⁶ = 31201020079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201020173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600510071 + 15600510072.

It is an arithmetic number, because the mean of its divisors is an integer number (15600510072).

Almost surely, 2^31201020143 is an apocalyptic number.

31201020143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201020143 is an equidigital number, since it uses as much as digits as its factorization.

31201020143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31201020143 its reverse (34102010213), we get a palindrome (65303030356).

The spelling of 31201020143 in words is "thirty-one billion, two hundred one million, twenty thousand, one hundred forty-three".