21655601124014 has 128 divisors (see below), whose sum is σ = 39639071969280. Its totient is φ = 8738379417600.

The previous prime is 21655601124007. The next prime is 21655601124037. The reversal of 21655601124014 is 41042110655612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3169263542 + ... + 3169270374.

It is an arithmetic number, because the mean of its divisors is an integer number (309680249760).

Almost surely, 2^{21655601124014} is an apocalyptic number.

21655601124014 is a deficient number, since it is larger than the sum of its proper divisors (17983470845266).

21655601124014 is a wasteful number, since it uses less digits than its factorization.

21655601124014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066.

The product of its (nonzero) digits is 57600, while the sum is 38.

Adding to 21655601124014 its reverse (41042110655612), we get a palindrome (62697711779626).

The spelling of 21655601124014 in words is "twenty-one trillion, six hundred fifty-five billion, six hundred one million, one hundred twenty-four thousand, fourteen".