31230120611 has 2 divisors, whose sum is σ = 31230120612. Its totient is φ = 31230120610.

The previous prime is 31230120587. The next prime is 31230120629. The reversal of 31230120611 is 11602103213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31230120611 - 2²² = 31225926307 is a prime.

It is not a weakly prime, because it can be changed into another prime (31230120671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615060305 + 15615060306.

It is an arithmetic number, because the mean of its divisors is an integer number (15615060306).

Almost surely, 2^31230120611 is an apocalyptic number.

31230120611 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230120611 is an equidigital number, since it uses as much as digits as its factorization.

31230120611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31230120611 its reverse (11602103213), we get a palindrome (42832223824).

The spelling of 31230120611 in words is "thirty-one billion, two hundred thirty million, one hundred twenty thousand, six hundred eleven".