21120421140522 has 96 divisors (see below), whose sum is σ = 50043588154560. Its totient is φ = 6384418133760.

The previous prime is 21120421140491. The next prime is 21120421140527. The reversal of 21120421140522 is 22504112402112.

21120421140522 is a `hidden beast` number, since 2 + 1 + 1 + 20 + 4 + 2 + 114 + 0 + 522 = 666.

It is a super-3 number, since 3×21120421140522³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120421140527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362186304 + ... + 362244612.

It is an arithmetic number, because the mean of its divisors is an integer number (521287376610).

Almost surely, 2^{21120421140522} is an apocalyptic number.

21120421140522 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 21120421140522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25021794077280).

21120421140522 is an abundant number, since it is smaller than the sum of its proper divisors (28923167014038).

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

21120421140522 is a wasteful number, since it uses less digits than its factorization.

21120421140522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62788 (or 62785 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

Adding to 21120421140522 its reverse (22504112402112), we get a palindrome (43624533542634).

The spelling of 21120421140522 in words is "twenty-one trillion, one hundred twenty billion, four hundred twenty-one million, one hundred forty thousand, five hundred twenty-two".