103902136621 has 2 divisors, whose sum is σ = 103902136622. Its totient is φ = 103902136620.

The previous prime is 103902136607. The next prime is 103902136739. The reversal of 103902136621 is 126631209301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99801655396 + 4100481225 = 315914^2 + 64035^2 .

It is an emirp because it is prime and its reverse (126631209301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103902136621 - 2⁵ = 103902136589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103902130621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51951068310 + 51951068311.

It is an arithmetic number, because the mean of its divisors is an integer number (51951068311).

Almost surely, 2^103902136621 is an apocalyptic number.

It is an amenable number.

103902136621 is a deficient number, since it is larger than the sum of its proper divisors (1).

103902136621 is an equidigital number, since it uses as much as digits as its factorization.

103902136621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 103902136621 in words is "one hundred three billion, nine hundred two million, one hundred thirty-six thousand, six hundred twenty-one".