102001001903 has 2 divisors, whose sum is σ = 102001001904. Its totient is φ = 102001001902.

The previous prime is 102001001899. The next prime is 102001001911. The reversal of 102001001903 is 309100100201.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (309100100201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102001001903 - 2² = 102001001899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102001000903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000500951 + 51000500952.

It is an arithmetic number, because the mean of its divisors is an integer number (51000500952).

Almost surely, 2^102001001903 is an apocalyptic number.

102001001903 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001001903 is an equidigital number, since it uses as much as digits as its factorization.

102001001903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 102001001903 in words is "one hundred two billion, one million, one thousand, nine hundred three".