31122002089 has 2 divisors, whose sum is σ = 31122002090. Its totient is φ = 31122002088.

The previous prime is 31122002083. The next prime is 31122002231. The reversal of 31122002089 is 98020022113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26536410000 + 4585592089 = 162900^2 + 67717^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122002089 - 2⁷ = 31122001961 is a prime.

It is not a weakly prime, because it can be changed into another prime (31122002083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561001044 + 15561001045.

It is an arithmetic number, because the mean of its divisors is an integer number (15561001045).

Almost surely, 2^31122002089 is an apocalyptic number.

It is an amenable number.

31122002089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122002089 is an equidigital number, since it uses as much as digits as its factorization.

31122002089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 31122002089 in words is "thirty-one billion, one hundred twenty-two million, two thousand, eighty-nine".