1021330139 has 2 divisors, whose sum is σ = 1021330140. Its totient is φ = 1021330138.

The previous prime is 1021330117. The next prime is 1021330147. The reversal of 1021330139 is 9310331201.

1021330139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021330139 - 2²⁸ = 752894683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021330039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510665069 + 510665070.

It is an arithmetic number, because the mean of its divisors is an integer number (510665070).

Almost surely, 2^1021330139 is an apocalyptic number.

1021330139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021330139 is an equidigital number, since it uses as much as digits as its factorization.

1021330139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1021330139 is about 31958.2561946049. The cubic root of 1021330139 is about 1007.0600842410.

The spelling of 1021330139 in words is "one billion, twenty-one million, three hundred thirty thousand, one hundred thirty-nine".