10520540134321 has 4 divisors (see below), whose sum is σ = 12023474439232. Its totient is φ = 9017605829412.

The previous prime is 10520540134309. The next prime is 10520540134333. The reversal of 10520540134321 is 12343104502501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10520540134309) and next prime (10520540134333).

It is a cyclic number.

It is not a de Polignac number, because 10520540134321 - 2⁴¹ = 8321516878769 is a prime.

It is a super-2 number, since 2×10520540134321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10520540134421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751467152445 + ... + 751467152458.

It is an arithmetic number, because the mean of its divisors is an integer number (3005868609808).

Almost surely, 2^{10520540134321} is an apocalyptic number.

It is an amenable number.

10520540134321 is a deficient number, since it is larger than the sum of its proper divisors (1502934304911).

10520540134321 is an equidigital number, since it uses as much as digits as its factorization.

10520540134321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502934304910.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 10520540134321 its reverse (12343104502501), we get a palindrome (22863644636822).

The spelling of 10520540134321 in words is "ten trillion, five hundred twenty billion, five hundred forty million, one hundred thirty-four thousand, three hundred twenty-one".