21300133124 has 6 divisors (see below), whose sum is σ = 37275232974. Its totient is φ = 10650066560.

The previous prime is 21300133117. The next prime is 21300133147. The reversal of 21300133124 is 42133100312.

It can be written as a sum of positive squares in only one way, i.e., 11933377600 + 9366755524 = 109240^2 + 96782^2 .

It is a super-2 number, since 2×21300133124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21300133096 and 21300133105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662516637 + ... + 2662516644.

It is an arithmetic number, because the mean of its divisors is an integer number (6212538829).

Almost surely, 2^21300133124 is an apocalyptic number.

It is an amenable number.

21300133124 is a deficient number, since it is larger than the sum of its proper divisors (15975099850).

21300133124 is a wasteful number, since it uses less digits than its factorization.

21300133124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5325033285 (or 5325033283 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21300133124 its reverse (42133100312), we get a palindrome (63433233436).

The spelling of 21300133124 in words is "twenty-one billion, three hundred million, one hundred thirty-three thousand, one hundred twenty-four".