21221344101630 has 32 divisors (see below), whose sum is σ = 51070003052544. Its totient is φ = 5643605403936.

The previous prime is 21221344101577. The next prime is 21221344101641. The reversal of 21221344101630 is 3610144312212.

21221344101630 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963719422 + ... + 963741441.

It is an arithmetic number, because the mean of its divisors is an integer number (1595937595392).

Almost surely, 2^{21221344101630} is an apocalyptic number.

21221344101630 is an abundant number, since it is smaller than the sum of its proper divisors (29848658950914).

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

21221344101630 is a wasteful number, since it uses less digits than its factorization.

21221344101630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927461240.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 21221344101630 its reverse (3610144312212), we get a palindrome (24831488413842).

The spelling of 21221344101630 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred forty-four million, one hundred one thousand, six hundred thirty".