21025110310512 has 480 divisors, whose sum is σ = 73016552784384. Its totient is φ = 5137322803200.

The previous prime is 21025110310489. The next prime is 21025110310613. The reversal of 21025110310512 is 21501301152012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 999709437 + ... + 999730467.

Almost surely, 2^{21025110310512} is an apocalyptic number.

21025110310512 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 21025110310512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36508276392192).

21025110310512 is an abundant number, since it is smaller than the sum of its proper divisors (51991442473872).

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

21025110310512 is a wasteful number, since it uses less digits than its factorization.

21025110310512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23357 (or 23344 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 21025110310512 its reverse (21501301152012), we get a palindrome (42526411462524).

The spelling of 21025110310512 in words is "twenty-one trillion, twenty-five billion, one hundred ten million, three hundred ten thousand, five hundred twelve".