21401222344410 has 256 divisors, whose sum is σ = 57940663910400. Its totient is φ = 5033784268800.

The previous prime is 21401222344399. The next prime is 21401222344421. The reversal of 21401222344410 is 1444322210412.

It is an interprime number because it is at equal distance from previous prime (21401222344399) and next prime (21401222344421).

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 143918517 + ... + 144067143.

It is an arithmetic number, because the mean of its divisors is an integer number (226330718400).

Almost surely, 2^{21401222344410} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21401222344410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28970331955200).

21401222344410 is an abundant number, since it is smaller than the sum of its proper divisors (36539441565990).

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

21401222344410 is a wasteful number, since it uses less digits than its factorization.

21401222344410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148997.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21401222344410 its reverse (1444322210412), we get a palindrome (22845544554822).

The spelling of 21401222344410 in words is "twenty-one trillion, four hundred one billion, two hundred twenty-two million, three hundred forty-four thousand, four hundred ten".