31151320121351 has 2 divisors, whose sum is σ = 31151320121352. Its totient is φ = 31151320121350.

The previous prime is 31151320121329. The next prime is 31151320121417. The reversal of 31151320121351 is 15312102315113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31151320121351 - 2¹⁸ = 31151319859207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31151320121951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15575660060675 + 15575660060676.

It is an arithmetic number, because the mean of its divisors is an integer number (15575660060676).

Almost surely, 2^{31151320121351} is an apocalyptic number.

31151320121351 is a deficient number, since it is larger than the sum of its proper divisors (1).

31151320121351 is an equidigital number, since it uses as much as digits as its factorization.

31151320121351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

Adding to 31151320121351 its reverse (15312102315113), we get a palindrome (46463422436464).

The spelling of 31151320121351 in words is "thirty-one trillion, one hundred fifty-one billion, three hundred twenty million, one hundred twenty-one thousand, three hundred fifty-one".