1019001121 has 8 divisors (see below), whose sum is σ = 1026314280. Its totient is φ = 1011698688.

The previous prime is 1019001089. The next prime is 1019001163. The reversal of 1019001121 is 1211009101.

It can be written as a sum of positive squares in 4 ways, for example, as 210395025 + 808606096 = 14505^2 + 28436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1019001121 - 2⁵ = 1019001089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1019001095 and 1019001104.

It is not an unprimeable number, because it can be changed into a prime (1019001721) 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, 323265 + ... + 326401.

It is an arithmetic number, because the mean of its divisors is an integer number (128289285).

Almost surely, 2^1019001121 is an apocalyptic number.

It is an amenable number.

1019001121 is a deficient number, since it is larger than the sum of its proper divisors (7313159).

1019001121 is a wasteful number, since it uses less digits than its factorization.

1019001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 1019001121 is about 31921.7969575649. The cubic root of 1019001121 is about 1006.2940093350.

The spelling of 1019001121 in words is "one billion, nineteen million, one thousand, one hundred twenty-one".