1031121139 has 2 divisors, whose sum is σ = 1031121140. Its totient is φ = 1031121138.

The previous prime is 1031121121. The next prime is 1031121149. The reversal of 1031121139 is 9311211301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1031121139 - 2¹³ = 1031112947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031121149) 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, 515560569 + 515560570.

It is an arithmetic number, because the mean of its divisors is an integer number (515560570).

Almost surely, 2^1031121139 is an apocalyptic number.

1031121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031121139 is an equidigital number, since it uses as much as digits as its factorization.

1031121139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1031121139 is about 32111.0750209332. The cubic root of 1031121139 is about 1010.2679219295.

The spelling of 1031121139 in words is "one billion, thirty-one million, one hundred twenty-one thousand, one hundred thirty-nine".