31120130171261 has 2 divisors, whose sum is σ = 31120130171262. Its totient is φ = 31120130171260.

The previous prime is 31120130171233. The next prime is 31120130171269. The reversal of 31120130171261 is 16217103102113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28783160620036 + 2336969551225 = 5364994^2 + 1528715^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120130171261 - 2⁶ = 31120130171197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31120130171269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560065085630 + 15560065085631.

It is an arithmetic number, because the mean of its divisors is an integer number (15560065085631).

Almost surely, 2^{31120130171261} is an apocalyptic number.

It is an amenable number.

31120130171261 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120130171261 is an equidigital number, since it uses as much as digits as its factorization.

31120130171261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

Adding to 31120130171261 its reverse (16217103102113), we get a palindrome (47337233273374).

The spelling of 31120130171261 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty million, one hundred seventy-one thousand, two hundred sixty-one".