21125211033003 has 64 divisors (see below), whose sum is σ = 35646290227200. Its totient is φ = 10808850729600.

The previous prime is 21125211032999. The next prime is 21125211033007. The reversal of 21125211033003 is 30033011252112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21125211032999) and next prime (21125211033007).

It is not a de Polignac number, because 21125211033003 - 2² = 21125211032999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21125211033007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116745468 + ... + 116926278.

It is an arithmetic number, because the mean of its divisors is an integer number (556973284800).

Almost surely, 2^{21125211033003} is an apocalyptic number.

21125211033003 is a deficient number, since it is larger than the sum of its proper divisors (14521079194197).

21125211033003 is a wasteful number, since it uses less digits than its factorization.

21125211033003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188448.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 21125211033003 its reverse (30033011252112), we get a palindrome (51158222285115).

The spelling of 21125211033003 in words is "twenty-one trillion, one hundred twenty-five billion, two hundred eleven million, thirty-three thousand, three".