1000520434421 has 16 divisors (see below), whose sum is σ = 1007620009200. Its totient is φ = 993449909760.

The previous prime is 1000520434411. The next prime is 1000520434489. The reversal of 1000520434421 is 1244340250001.

It can be written as a sum of positive squares in 8 ways, for example, as 28247524900 + 972272909521 = 168070^2 + 986039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000520434421 is a prime.

It is a super-2 number, since 2×1000520434421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000520434411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228792791 + ... + 228797163.

It is an arithmetic number, because the mean of its divisors is an integer number (62976250575).

Almost surely, 2^{1000520434421} is an apocalyptic number.

It is an amenable number.

1000520434421 is a deficient number, since it is larger than the sum of its proper divisors (7099574779).

1000520434421 is a wasteful number, since it uses less digits than its factorization.

1000520434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 1000520434421 its reverse (1244340250001), we get a palindrome (2244860684422).

The spelling of 1000520434421 in words is "one trillion, five hundred twenty million, four hundred thirty-four thousand, four hundred twenty-one".