21352525201230 has 128 divisors (see below), whose sum is σ = 54399992739840. Its totient is φ = 5345298739200.

The previous prime is 21352525201223. The next prime is 21352525201237. The reversal of 21352525201230 is 3210252525312.

It is an interprime number because it is at equal distance from previous prime (21352525201223) and next prime (21352525201237).

It is a junction number, because it is equal to n+sod(n) for n = 21352525201191 and 21352525201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352525201237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 897115330 + ... + 897139130.

It is an arithmetic number, because the mean of its divisors is an integer number (424999943280).

Almost surely, 2^{21352525201230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21352525201230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27199996369920).

21352525201230 is an abundant number, since it is smaller than the sum of its proper divisors (33047467538610).

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

21352525201230 is a wasteful number, since it uses less digits than its factorization.

21352525201230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28274.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 21352525201230 its reverse (3210252525312), we get a palindrome (24562777726542).

The spelling of 21352525201230 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred one thousand, two hundred thirty".