21012240222324 has 144 divisors (see below), whose sum is σ = 57688781230080. Its totient is φ = 6410124241920.

The previous prime is 21012240222301. The next prime is 21012240222329. The reversal of 21012240222324 is 42322204221012.

21012240222324 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 22 + 402 + 2 + 232 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012240222329) 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, 89690812 + ... + 89924780.

It is an arithmetic number, because the mean of its divisors is an integer number (400616536320).

Almost surely, 2^{21012240222324} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21012240222324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28844390615040).

21012240222324 is an abundant number, since it is smaller than the sum of its proper divisors (36676541007756).

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

21012240222324 is a wasteful number, since it uses less digits than its factorization.

21012240222324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235630 (or 235625 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21012240222324 its reverse (42322204221012), we get a palindrome (63334444443336).

The spelling of 21012240222324 in words is "twenty-one trillion, twelve billion, two hundred forty million, two hundred twenty-two thousand, three hundred twenty-four".