21142313124 has 12 divisors (see below), whose sum is σ = 49332063984. Its totient is φ = 7047437704.

The previous prime is 21142313123. The next prime is 21142313141. The reversal of 21142313124 is 42131324112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21142313094 and 21142313103.

It is not an unprimeable number, because it can be changed into a prime (21142313123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880929702 + ... + 880929725.

It is an arithmetic number, because the mean of its divisors is an integer number (4111005332).

Almost surely, 2^21142313124 is an apocalyptic number.

It is an amenable number.

21142313124 is an abundant number, since it is smaller than the sum of its proper divisors (28189750860).

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

21142313124 is a wasteful number, since it uses less digits than its factorization.

21142313124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761859434 (or 1761859432 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 21142313124 its reverse (42131324112), we get a palindrome (63273637236).

The spelling of 21142313124 in words is "twenty-one billion, one hundred forty-two million, three hundred thirteen thousand, one hundred twenty-four".