281104121 has 2 divisors, whose sum is σ = 281104122. Its totient is φ = 281104120.

The previous prime is 281104081. The next prime is 281104139. The reversal of 281104121 is 121401182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154654096 + 126450025 = 12436^2 + 11245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281104121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 281104093 and 281104102.

It is not a weakly prime, because it can be changed into another prime (281104171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140552060 + 140552061.

It is an arithmetic number, because the mean of its divisors is an integer number (140552061).

Almost surely, 2^281104121 is an apocalyptic number.

It is an amenable number.

281104121 is a deficient number, since it is larger than the sum of its proper divisors (1).

281104121 is an equidigital number, since it uses as much as digits as its factorization.

281104121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 281104121 is about 16766.1599956579. The cubic root of 281104121 is about 655.0720515887.

The spelling of 281104121 in words is "two hundred eighty-one million, one hundred four thousand, one hundred twenty-one".