1023500012521 has 4 divisors (see below), whose sum is σ = 1169714300032. Its totient is φ = 877285725012.

The previous prime is 1023500012477. The next prime is 1023500012527. The reversal of 1023500012521 is 1252100053201.

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 a cyclic number.

It is not a de Polignac number, because 1023500012521 - 2¹⁷ = 1023499881449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023500012492 and 1023500012501.

It is not an unprimeable number, because it can be changed into a prime (1023500012527) 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, 73107143745 + ... + 73107143758.

It is an arithmetic number, because the mean of its divisors is an integer number (292428575008).

Almost surely, 2^{1023500012521} is an apocalyptic number.

It is an amenable number.

1023500012521 is a deficient number, since it is larger than the sum of its proper divisors (146214287511).

1023500012521 is an equidigital number, since it uses as much as digits as its factorization.

1023500012521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146214287510.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 1023500012521 its reverse (1252100053201), we get a palindrome (2275600065722).

The spelling of 1023500012521 in words is "one trillion, twenty-three billion, five hundred million, twelve thousand, five hundred twenty-one".