1021712399 has 2 divisors, whose sum is σ = 1021712400. Its totient is φ = 1021712398.

The previous prime is 1021712383. The next prime is 1021712401. The reversal of 1021712399 is 9932171201.

1021712399 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 1021712399 - 2⁴ = 1021712383 is a prime.

It is a super-5 number, since 5×1021712399⁵ (a number of 46 digits) contains 55555 as substring.

Together with 1021712401, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021712899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510856199 + 510856200.

It is an arithmetic number, because the mean of its divisors is an integer number (510856200).

Almost surely, 2^1021712399 is an apocalyptic number.

1021712399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021712399 is an equidigital number, since it uses as much as digits as its factorization.

1021712399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1021712399 is about 31964.2362492834. The cubic root of 1021712399 is about 1007.1857082536.

The spelling of 1021712399 in words is "one billion, twenty-one million, seven hundred twelve thousand, three hundred ninety-nine".