31030120223 has 2 divisors, whose sum is σ = 31030120224. Its totient is φ = 31030120222.

The previous prime is 31030120211. The next prime is 31030120267. The reversal of 31030120223 is 32202103013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31030120223 - 2⁴ = 31030120207 is a prime.

It is a super-2 number, since 2×31030120223² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31030120273) 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, 15515060111 + 15515060112.

It is an arithmetic number, because the mean of its divisors is an integer number (15515060112).

Almost surely, 2^31030120223 is an apocalyptic number.

31030120223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030120223 is an equidigital number, since it uses as much as digits as its factorization.

31030120223 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 17.

Adding to 31030120223 its reverse (32202103013), we get a palindrome (63232223236).

The spelling of 31030120223 in words is "thirty-one billion, thirty million, one hundred twenty thousand, two hundred twenty-three".