21213600255622 has 32 divisors (see below), whose sum is σ = 33998880189600. Its totient is φ = 9892317442560.

The previous prime is 21213600255487. The next prime is 21213600255629. The reversal of 21213600255622 is 22655200631212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213600255629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2840428 + ... + 7105999.

It is an arithmetic number, because the mean of its divisors is an integer number (1062465005925).

Almost surely, 2^{21213600255622} is an apocalyptic number.

21213600255622 is a deficient number, since it is larger than the sum of its proper divisors (12785279933978).

21213600255622 is a wasteful number, since it uses less digits than its factorization.

21213600255622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947016.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 21213600255622 its reverse (22655200631212), we get a palindrome (43868800886834).

The spelling of 21213600255622 in words is "twenty-one trillion, two hundred thirteen billion, six hundred million, two hundred fifty-five thousand, six hundred twenty-two".