21321544124134 has 4 divisors (see below), whose sum is σ = 31982316186204. Its totient is φ = 10660772062066.

The previous prime is 21321544124099. The next prime is 21321544124159. The reversal of 21321544124134 is 43142144512312.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21321544124093 and 21321544124102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330386031032 + ... + 5330386031035.

It is an arithmetic number, because the mean of its divisors is an integer number (7995579046551).

Almost surely, 2^{21321544124134} is an apocalyptic number.

21321544124134 is a deficient number, since it is larger than the sum of its proper divisors (10660772062070).

21321544124134 is a wasteful number, since it uses less digits than its factorization.

21321544124134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660772062069.

The product of its digits is 92160, while the sum is 37.

Adding to 21321544124134 its reverse (43142144512312), we get a palindrome (64463688636446).

The spelling of 21321544124134 in words is "twenty-one trillion, three hundred twenty-one billion, five hundred forty-four million, one hundred twenty-four thousand, one hundred thirty-four".