21340222012424 has 32 divisors (see below), whose sum is σ = 45766438197120. Its totient is φ = 9138331228416.

The previous prime is 21340222012409. The next prime is 21340222012489. The reversal of 21340222012424 is 42421022204312.

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, 155726849 + ... + 155863824.

It is an arithmetic number, because the mean of its divisors is an integer number (1430201193660).

Almost surely, 2^{21340222012424} is an apocalyptic number.

It is an amenable number.

21340222012424 is an abundant number, since it is smaller than the sum of its proper divisors (24426216184696).

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

21340222012424 is a wasteful number, since it uses less digits than its factorization.

21340222012424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311591909 (or 311591905 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21340222012424 its reverse (42421022204312), we get a palindrome (63761244216736).

The spelling of 21340222012424 in words is "twenty-one trillion, three hundred forty billion, two hundred twenty-two million, twelve thousand, four hundred twenty-four".