103914987721 has 2 divisors, whose sum is σ = 103914987722. Its totient is φ = 103914987720.

The previous prime is 103914987707. The next prime is 103914987733. The reversal of 103914987721 is 127789419301.

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., 103838617600 + 76370121 = 322240^2 + 8739^2 .

It is a cyclic number.

It is not a de Polignac number, because 103914987721 - 2²⁵ = 103881433289 is a prime.

It is not a weakly prime, because it can be changed into another prime (103914981721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51957493860 + 51957493861.

It is an arithmetic number, because the mean of its divisors is an integer number (51957493861).

Almost surely, 2^103914987721 is an apocalyptic number.

It is an amenable number.

103914987721 is a deficient number, since it is larger than the sum of its proper divisors (1).

103914987721 is an equidigital number, since it uses as much as digits as its factorization.

103914987721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 103914987721 in words is "one hundred three billion, nine hundred fourteen million, nine hundred eighty-seven thousand, seven hundred twenty-one".