21210341015622 has 128 divisors (see below), whose sum is σ = 49251313778688. Its totient is φ = 6018204326400.

The previous prime is 21210341015603. The next prime is 21210341015627. The reversal of 21210341015622 is 22651014301212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210341015622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210341015627) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 636109083 + ... + 636142425.

It is an arithmetic number, because the mean of its divisors is an integer number (384775888896).

Almost surely, 2^{21210341015622} is an apocalyptic number.

21210341015622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210341015622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24625656889344).

21210341015622 is an abundant number, since it is smaller than the sum of its proper divisors (28040972763066).

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

21210341015622 is a wasteful number, since it uses less digits than its factorization.

21210341015622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36274.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21210341015622 its reverse (22651014301212), we get a palindrome (43861355316834).

The spelling of 21210341015622 in words is "twenty-one trillion, two hundred ten billion, three hundred forty-one million, fifteen thousand, six hundred twenty-two".