21123451344332 has 48 divisors (see below), whose sum is σ = 38025667972320. Its totient is φ = 10263874521600.

The previous prime is 21123451344313. The next prime is 21123451344409. The reversal of 21123451344332 is 23344315432112.

It is a super-2 number, since 2×21123451344332² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 5555894 + ... + 8550722.

It is an arithmetic number, because the mean of its divisors is an integer number (792201416090).

Almost surely, 2^{21123451344332} is an apocalyptic number.

It is an amenable number.

21123451344332 is a deficient number, since it is larger than the sum of its proper divisors (16902216627988).

21123451344332 is a wasteful number, since it uses less digits than its factorization.

21123451344332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995242 (or 2995240 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

Adding to 21123451344332 its reverse (23344315432112), we get a palindrome (44467766776444).

The spelling of 21123451344332 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred fifty-one million, three hundred forty-four thousand, three hundred thirty-two".