21132123003 has 36 divisors (see below), whose sum is σ = 33089261400. Its totient is φ = 12950840448.

The previous prime is 21132122989. The next prime is 21132123017. The reversal of 21132123003 is 30032123112.

It is an interprime number because it is at equal distance from previous prime (21132122989) and next prime (21132123017).

It is not a de Polignac number, because 21132123003 - 2⁵ = 21132122971 is a prime.

It is a super-2 number, since 2×21132123003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21132123073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 245548 + ... + 320246.

It is an arithmetic number, because the mean of its divisors is an integer number (919146150).

Almost surely, 2^21132123003 is an apocalyptic number.

21132123003 is a deficient number, since it is larger than the sum of its proper divisors (11957138397).

21132123003 is a wasteful number, since it uses less digits than its factorization.

21132123003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74808 (or 74762 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21132123003 its reverse (30032123112), we get a palindrome (51164246115).

The spelling of 21132123003 in words is "twenty-one billion, one hundred thirty-two million, one hundred twenty-three thousand, three".