1002100003897 has 2 divisors, whose sum is σ = 1002100003898. Its totient is φ = 1002100003896.

The previous prime is 1002100003859. The next prime is 1002100003903. The reversal of 1002100003897 is 7983000012001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925913515536 + 76186488361 = 962244^2 + 276019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002100003897 - 2³¹ = 999952520249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002100003837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501050001948 + 501050001949.

It is an arithmetic number, because the mean of its divisors is an integer number (501050001949).

Almost surely, 2^{1002100003897} is an apocalyptic number.

It is an amenable number.

1002100003897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002100003897 is an equidigital number, since it uses as much as digits as its factorization.

1002100003897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

Adding to 1002100003897 its reverse (7983000012001), we get a palindrome (8985100015898).

The spelling of 1002100003897 in words is "one trillion, two billion, one hundred million, three thousand, eight hundred ninety-seven".