30431031121 has 2 divisors, whose sum is σ = 30431031122. Its totient is φ = 30431031120.

The previous prime is 30431031119. The next prime is 30431031133. The reversal of 30431031121 is 12113013403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20237907600 + 10193123521 = 142260^2 + 100961^2 .

It is a cyclic number.

It is not a de Polignac number, because 30431031121 - 2¹ = 30431031119 is a prime.

Together with 30431031119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30431031181) 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, 15215515560 + 15215515561.

It is an arithmetic number, because the mean of its divisors is an integer number (15215515561).

Almost surely, 2^30431031121 is an apocalyptic number.

It is an amenable number.

30431031121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30431031121 is an equidigital number, since it uses as much as digits as its factorization.

30431031121 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 19.

Adding to 30431031121 its reverse (12113013403), we get a palindrome (42544044524).

The spelling of 30431031121 in words is "thirty billion, four hundred thirty-one million, thirty-one thousand, one hundred twenty-one".