103938827821 has 2 divisors, whose sum is σ = 103938827822. Its totient is φ = 103938827820.

The previous prime is 103938827791. The next prime is 103938827831. The reversal of 103938827821 is 128728839301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52813095721 + 51125732100 = 229811^2 + 226110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103938827821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103938827831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51969413910 + 51969413911.

It is an arithmetic number, because the mean of its divisors is an integer number (51969413911).

Almost surely, 2^103938827821 is an apocalyptic number.

It is an amenable number.

103938827821 is a deficient number, since it is larger than the sum of its proper divisors (1).

103938827821 is an equidigital number, since it uses as much as digits as its factorization.

103938827821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 103938827821 in words is "one hundred three billion, nine hundred thirty-eight million, eight hundred twenty-seven thousand, eight hundred twenty-one".