21203103001332 has 24 divisors (see below), whose sum is σ = 56541608003776. Its totient is φ = 6058029428928.

The previous prime is 21203103001313. The next prime is 21203103001369. The reversal of 21203103001332 is 23310030130212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21203103001299 and 21203103001308.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 126208946353 + ... + 126208946520.

Almost surely, 2^{21203103001332} is an apocalyptic number.

It is an amenable number.

21203103001332 is an abundant number, since it is smaller than the sum of its proper divisors (35338505002444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203103001332 is a wasteful number, since it uses less digits than its factorization.

21203103001332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252417892887 (or 252417892885 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21203103001332 its reverse (23310030130212), we get a palindrome (44513133131544).

The spelling of 21203103001332 in words is "twenty-one trillion, two hundred three billion, one hundred three million, one thousand, three hundred thirty-two".