21053031022452 has 192 divisors, whose sum is σ = 61167264480000. Its totient is φ = 5537049477120.

The previous prime is 21053031022427. The next prime is 21053031022489. The reversal of 21053031022452 is 25422013035012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29076924 + ... + 29792172.

It is an arithmetic number, because the mean of its divisors is an integer number (318579502500).

Almost surely, 2^{21053031022452} is an apocalyptic number.

21053031022452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21053031022452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30583632240000).

21053031022452 is an abundant number, since it is smaller than the sum of its proper divisors (40114233457548).

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

21053031022452 is a wasteful number, since it uses less digits than its factorization.

21053031022452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716306 (or 716304 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21053031022452 its reverse (25422013035012), we get a palindrome (46475044057464).

The spelling of 21053031022452 in words is "twenty-one trillion, fifty-three billion, thirty-one million, twenty-two thousand, four hundred fifty-two".