1121000401 has 2 divisors, whose sum is σ = 1121000402. Its totient is φ = 1121000400.

The previous prime is 1121000299. The next prime is 1121000449. The reversal of 1121000401 is 1040001211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729000000 + 392000401 = 27000^2 + 19799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121000401 - 2¹⁷ = 1120869329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121000471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560500200 + 560500201.

It is an arithmetic number, because the mean of its divisors is an integer number (560500201).

Almost surely, 2^1121000401 is an apocalyptic number.

It is an amenable number.

1121000401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121000401 is an equidigital number, since it uses as much as digits as its factorization.

1121000401 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 1121000401 is about 33481.3440739765. The cubic root of 1121000401 is about 1038.8079293246.

Adding to 1121000401 its reverse (1040001211), we get a palindrome (2161001612).

The spelling of 1121000401 in words is "one billion, one hundred twenty-one million, four hundred one", and thus it is an aban number.