21113551005622 has 16 divisors (see below), whose sum is σ = 33533749962720. Its totient is φ = 9935651502208.

The previous prime is 21113551005581. The next prime is 21113551005641. The reversal of 21113551005622 is 22650015531112.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 1767922 + ... + 6734437.

It is an arithmetic number, because the mean of its divisors is an integer number (2095859372670).

Almost surely, 2^{21113551005622} is an apocalyptic number.

21113551005622 is a deficient number, since it is larger than the sum of its proper divisors (12420198957098).

21113551005622 is a wasteful number, since it uses less digits than its factorization.

21113551005622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8575415.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 21113551005622 its reverse (22650015531112), we get a palindrome (43763566536734).

The spelling of 21113551005622 in words is "twenty-one trillion, one hundred thirteen billion, five hundred fifty-one million, five thousand, six hundred twenty-two".