100380384781 has 2 divisors, whose sum is σ = 100380384782. Its totient is φ = 100380384780.

The previous prime is 100380384751. The next prime is 100380384803. The reversal of 100380384781 is 187483083001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89790122500 + 10590262281 = 299650^2 + 102909^2 .

It is an emirp because it is prime and its reverse (187483083001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100380384781 - 2¹¹ = 100380382733 is a prime.

It is a super-2 number, since 2×100380384781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100380384701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50190192390 + 50190192391.

It is an arithmetic number, because the mean of its divisors is an integer number (50190192391).

Almost surely, 2^100380384781 is an apocalyptic number.

It is an amenable number.

100380384781 is a deficient number, since it is larger than the sum of its proper divisors (1).

100380384781 is an equidigital number, since it uses as much as digits as its factorization.

100380384781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 100380384781 in words is "one hundred billion, three hundred eighty million, three hundred eighty-four thousand, seven hundred eighty-one".