103856121 has 8 divisors (see below), whose sum is σ = 153860960. Its totient is φ = 69237396.

The previous prime is 103856119. The next prime is 103856141. The reversal of 103856121 is 121658301.

103856121 is a `hidden beast` number, since 10 + 38 + 5 + 612 + 1 = 666.

It is not a de Polignac number, because 103856121 - 2¹ = 103856119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3846523 = 103856121 / (1 + 0 + 3 + 8 + 5 + 6 + 1 + 2 + 1).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103856101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1923235 + ... + 1923288.

It is an arithmetic number, because the mean of its divisors is an integer number (19232620).

Almost surely, 2^103856121 is an apocalyptic number.

It is an amenable number.

103856121 is a deficient number, since it is larger than the sum of its proper divisors (50004839).

103856121 is an equidigital number, since it uses as much as digits as its factorization.

103856121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846532 (or 3846526 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 103856121 is about 10190.9823373412. The cubic root of 103856121 is about 470.0499735606.

The spelling of 103856121 in words is "one hundred three million, eight hundred fifty-six thousand, one hundred twenty-one".