102021864017 has 2 divisors, whose sum is σ = 102021864018. Its totient is φ = 102021864016.

The previous prime is 102021863969. The next prime is 102021864047. The reversal of 102021864017 is 710468120201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100266589201 + 1755274816 = 316649^2 + 41896^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021864017 - 2¹⁰ = 102021862993 is a prime.

It is not a weakly prime, because it can be changed into another prime (102021864047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010932008 + 51010932009.

It is an arithmetic number, because the mean of its divisors is an integer number (51010932009).

Almost surely, 2^102021864017 is an apocalyptic number.

It is an amenable number.

102021864017 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021864017 is an equidigital number, since it uses as much as digits as its factorization.

102021864017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

Adding to 102021864017 its reverse (710468120201), we get a palindrome (812489984218).

The spelling of 102021864017 in words is "one hundred two billion, twenty-one million, eight hundred sixty-four thousand, seventeen".