31231122029 has 2 divisors, whose sum is σ = 31231122030. Its totient is φ = 31231122028.

The previous prime is 31231122001. The next prime is 31231122053. The reversal of 31231122029 is 92022113213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22959219529 + 8271902500 = 151523^2 + 90950^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231122029 - 2¹² = 31231117933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31231121989 and 31231122007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231122829) 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, 15615561014 + 15615561015.

It is an arithmetic number, because the mean of its divisors is an integer number (15615561015).

Almost surely, 2^31231122029 is an apocalyptic number.

It is an amenable number.

31231122029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231122029 is an equidigital number, since it uses as much as digits as its factorization.

31231122029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 31231122029 in words is "thirty-one billion, two hundred thirty-one million, one hundred twenty-two thousand, twenty-nine".