10521213143 has 4 divisors (see below), whose sum is σ = 12024243600. Its totient is φ = 9018182688.

The previous prime is 10521213103. The next prime is 10521213149. The reversal of 10521213143 is 34131212501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34131212501 = 67853 ⋅503017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10521213143 is a prime.

It is a super-2 number, since 2×10521213143² (a number of 21 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 (10521213149) 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, 751515218 + ... + 751515231.

It is an arithmetic number, because the mean of its divisors is an integer number (3006060900).

Almost surely, 2^10521213143 is an apocalyptic number.

10521213143 is a deficient number, since it is larger than the sum of its proper divisors (1503030457).

10521213143 is an equidigital number, since it uses as much as digits as its factorization.

10521213143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503030456.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 10521213143 its reverse (34131212501), we get a palindrome (44652425644).

The spelling of 10521213143 in words is "ten billion, five hundred twenty-one million, two hundred thirteen thousand, one hundred forty-three".