21124131334 has 16 divisors (see below), whose sum is σ = 33368727600. Its totient is φ = 10001716704.

The previous prime is 21124131331. The next prime is 21124131359. The reversal of 21124131334 is 43313142112.

It is a junction number, because it is equal to n+sod(n) for n = 21124131299 and 21124131308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124131331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36277 + ... + 208720.

It is an arithmetic number, because the mean of its divisors is an integer number (2085545475).

Almost surely, 2^21124131334 is an apocalyptic number.

21124131334 is a deficient number, since it is larger than the sum of its proper divisors (12244596266).

21124131334 is a wasteful number, since it uses less digits than its factorization.

21124131334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247287.

The product of its digits is 1728, while the sum is 25.

Adding to 21124131334 its reverse (43313142112), we get a palindrome (64437273446).

The spelling of 21124131334 in words is "twenty-one billion, one hundred twenty-four million, one hundred thirty-one thousand, three hundred thirty-four".