1001432121 has 32 divisors (see below), whose sum is σ = 1438187520. Its totient is φ = 618197184.

The previous prime is 1001432119. The next prime is 1001432123. The reversal of 1001432121 is 1212341001.

1001432121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1001432119) and next prime (1001432123).

It is not a de Polignac number, because 1001432121 - 2¹ = 1001432119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001432121.

It is not an unprimeable number, because it can be changed into a prime (1001432123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 568440 + ... + 570198.

It is an arithmetic number, because the mean of its divisors is an integer number (44943360).

Almost surely, 2^1001432121 is an apocalyptic number.

It is an amenable number.

1001432121 is a deficient number, since it is larger than the sum of its proper divisors (436755399).

1001432121 is a wasteful number, since it uses less digits than its factorization.

1001432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1001432121 is about 31645.4123215356. The cubic root of 1001432121 is about 1000.4771459622.

Adding to 1001432121 its reverse (1212341001), we get a palindrome (2213773122).

The spelling of 1001432121 in words is "one billion, one million, four hundred thirty-two thousand, one hundred twenty-one".