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10040143021 = 19750965193

10040143021 has 4 divisors (see below), whose sum is σ = 10091108412. Its totient is φ = 9989177632.

The previous prime is 10040143019. The next prime is 10040143079. The reversal of 10040143021 is 12034104001.

Adding to 10040143021 its reverse (12034104001), we get a palindrome (22074247022).

10040143021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12034104001 = 16772060503.

It can be written as a sum of positive squares in 2 ways, for example, as 5544440521 + 4495702500 = 74461^2 + 67050^2 .

It is a cyclic number.

It is not a de Polignac number, because 10040143021 - 21 = 10040143019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10040142986 and 10040143004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10040143081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25482400 + ... + 25482793.

It is an arithmetic number, because the mean of its divisors is an integer number (2522777103).

Almost surely, 210040143021 is an apocalyptic number.

It is an amenable number.

10040143021 is a deficient number, since it is larger than the sum of its proper divisors (50965391).

10040143021 is an equidigital number, since it uses as much as digits as its factorization.

10040143021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50965390.

The product of its (nonzero) digits is 96, while the sum is 16.

The spelling of 10040143021 in words is "ten billion, forty million, one hundred forty-three thousand, twenty-one".

Divisors: 1 197 50965193 10040143021