21213142324 has 48 divisors (see below), whose sum is σ = 41020056000. Its totient is φ = 9518192640.

The previous prime is 21213142319. The next prime is 21213142337. The reversal of 21213142324 is 42324131212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7715302 + ... + 7718050.

It is an arithmetic number, because the mean of its divisors is an integer number (854584500).

Almost surely, 2^21213142324 is an apocalyptic number.

It is an amenable number.

21213142324 is a deficient number, since it is larger than the sum of its proper divisors (19806913676).

21213142324 is a wasteful number, since it uses less digits than its factorization.

21213142324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960 (or 4958 counting only the distinct ones).

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

Adding to 21213142324 its reverse (42324131212), we get a palindrome (63537273536).

The spelling of 21213142324 in words is "twenty-one billion, two hundred thirteen million, one hundred forty-two thousand, three hundred twenty-four".