31211003131349 has 2 divisors, whose sum is σ = 31211003131350. Its totient is φ = 31211003131348.

The previous prime is 31211003131309. The next prime is 31211003131367. The reversal of 31211003131349 is 94313130011213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22186878987025 + 9024124144324 = 4710295^2 + 3004018^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211003131349 - 2¹² = 31211003127253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211003131309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605501565674 + 15605501565675.

It is an arithmetic number, because the mean of its divisors is an integer number (15605501565675).

Almost surely, 2^{31211003131349} is an apocalyptic number.

It is an amenable number.

31211003131349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211003131349 is an equidigital number, since it uses as much as digits as its factorization.

31211003131349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 31211003131349 in words is "thirty-one trillion, two hundred eleven billion, three million, one hundred thirty-one thousand, three hundred forty-nine".