1001403023121 has 6 divisors (see below), whose sum is σ = 1446471033410. Its totient is φ = 667602015408.

The previous prime is 1001403023107. The next prime is 1001403023177. The reversal of 1001403023121 is 1213203041001.

1001403023121 is a `hidden beast` number, since 10 + 0 + 1 + 40 + 302 + 312 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 751038890625 + 250364132496 = 866625^2 + 500364^2 .

It is not a de Polignac number, because 1001403023121 - 2⁷ = 1001403022993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001403023094 and 1001403023103.

It is not an unprimeable number, because it can be changed into a prime (1001403023821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55633501276 + ... + 55633501293.

Almost surely, 2^{1001403023121} is an apocalyptic number.

It is an amenable number.

1001403023121 is a deficient number, since it is larger than the sum of its proper divisors (445068010289).

1001403023121 is a wasteful number, since it uses less digits than its factorization.

1001403023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111267002575 (or 111267002572 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1001403023121 its reverse (1213203041001), we get a palindrome (2214606064122).

The spelling of 1001403023121 in words is "one trillion, one billion, four hundred three million, twenty-three thousand, one hundred twenty-one".