1100040121 has 2 divisors, whose sum is σ = 1100040122. Its totient is φ = 1100040120.

The previous prime is 1100040119. The next prime is 1100040157. The reversal of 1100040121 is 1210400011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1099850896 + 189225 = 33164^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100040121 - 2¹ = 1100040119 is a prime.

Together with 1100040119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1100040098 and 1100040107.

It is not a weakly prime, because it can be changed into another prime (1100043121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550020060 + 550020061.

It is an arithmetic number, because the mean of its divisors is an integer number (550020061).

Almost surely, 2^1100040121 is an apocalyptic number.

It is an amenable number.

1100040121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100040121 is an equidigital number, since it uses as much as digits as its factorization.

1100040121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1100040121 is about 33166.8527448716. The cubic root of 1100040121 is about 1032.2926656403.

Adding to 1100040121 its reverse (1210400011), we get a palindrome (2310440132).

The spelling of 1100040121 in words is "one billion, one hundred million, forty thousand, one hundred twenty-one".