21342132124 has 24 divisors (see below), whose sum is σ = 39081208320. Its totient is φ = 10178658864.

The previous prime is 21342132083. The next prime is 21342132131. The reversal of 21342132124 is 42123124312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290064 + ... + 356119.

It is an arithmetic number, because the mean of its divisors is an integer number (1628383680).

Almost surely, 2^21342132124 is an apocalyptic number.

It is an amenable number.

21342132124 is a deficient number, since it is larger than the sum of its proper divisors (17739076196).

21342132124 is a wasteful number, since it uses less digits than its factorization.

21342132124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646569 (or 646567 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 21342132124 its reverse (42123124312), we get a palindrome (63465256436).

The spelling of 21342132124 in words is "twenty-one billion, three hundred forty-two million, one hundred thirty-two thousand, one hundred twenty-four".