21042211410 has 96 divisors (see below), whose sum is σ = 59748668928. Its totient is φ = 5095560960.

The previous prime is 21042211373. The next prime is 21042211417. The reversal of 21042211410 is 1411224012.

21042211410 is a `hidden beast` number, since 2 + 1 + 0 + 42 + 211 + 410 = 666.

It is a super-2 number, since 2×21042211410² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21042211417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 932319 + ... + 954621.

It is an arithmetic number, because the mean of its divisors is an integer number (622381968).

Almost surely, 2^21042211410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21042211410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29874334464).

21042211410 is an abundant number, since it is smaller than the sum of its proper divisors (38706457518).

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

21042211410 is a wasteful number, since it uses less digits than its factorization.

21042211410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280 (or 23277 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21042211410 its reverse (1411224012), we get a palindrome (22453435422).

The spelling of 21042211410 in words is "twenty-one billion, forty-two million, two hundred eleven thousand, four hundred ten".