1021101799 has 2 divisors, whose sum is σ = 1021101800. Its totient is φ = 1021101798.

The previous prime is 1021101797. The next prime is 1021101811. The reversal of 1021101799 is 9971011201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9971011201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021101799 - 2¹ = 1021101797 is a prime.

Together with 1021101797, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1021101799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021101791) 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, 510550899 + 510550900.

It is an arithmetic number, because the mean of its divisors is an integer number (510550900).

Almost surely, 2^1021101799 is an apocalyptic number.

1021101799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021101799 is an equidigital number, since it uses as much as digits as its factorization.

1021101799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 1021101799 is about 31954.6835221380. The cubic root of 1021101799 is about 1006.9850287717.

The spelling of 1021101799 in words is "one billion, twenty-one million, one hundred one thousand, seven hundred ninety-nine".