102020101999897 has 2 divisors, whose sum is σ = 102020101999898. Its totient is φ = 102020101999896.

The previous prime is 102020101999867. The next prime is 102020102000021. The reversal of 102020101999897 is 798999101020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88873306525696 + 13146795474201 = 9427264^2 + 3625851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102020101999897 is a prime.

It is not a weakly prime, because it can be changed into another prime (102020101999817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010050999948 + 51010050999949.

It is an arithmetic number, because the mean of its divisors is an integer number (51010050999949).

Almost surely, 2^{102020101999897} is an apocalyptic number.

It is an amenable number.

102020101999897 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020101999897 is an equidigital number, since it uses as much as digits as its factorization.

102020101999897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 58.

The spelling of 102020101999897 in words is "one hundred two trillion, twenty billion, one hundred one million, nine hundred ninety-nine thousand, eight hundred ninety-seven".