10203212523 has 24 divisors (see below), whose sum is σ = 15868595712. Its totient is φ = 5814489744.

The previous prime is 10203212501. The next prime is 10203212581. The reversal of 10203212523 is 32521230201.

It is not a de Polignac number, because 10203212523 - 2¹³ = 10203204331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 10203212523.

It is not an unprimeable number, because it can be changed into a prime (10203211523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40615 + ... + 148512.

It is an arithmetic number, because the mean of its divisors is an integer number (661191488).

Almost surely, 2^10203212523 is an apocalyptic number.

10203212523 is a deficient number, since it is larger than the sum of its proper divisors (5665383189).

10203212523 is a wasteful number, since it uses less digits than its factorization.

10203212523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189511 (or 189504 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 10203212523 its reverse (32521230201), we get a palindrome (42724442724).

The spelling of 10203212523 in words is "ten billion, two hundred three million, two hundred twelve thousand, five hundred twenty-three".