212521003500 has 192 divisors, whose sum is σ = 705670842240. Its totient is φ = 49235558400.

The previous prime is 212521003481. The next prime is 212521003529. The reversal of 212521003500 is 5300125212.

It is a super-3 number, since 3×212521003500³ (a number of 35 digits) contains 333 as substring.

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, 10956 + ... + 652044.

It is an arithmetic number, because the mean of its divisors is an integer number (3675368970).

Almost surely, 2^212521003500 is an apocalyptic number.

212521003500 is a gapful number since it is divisible by the number (20) 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 212521003500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352835421120).

212521003500 is an abundant number, since it is smaller than the sum of its proper divisors (493149838740).

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

212521003500 is a wasteful number, since it uses less digits than its factorization.

212521003500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641141 (or 641129 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 212521003500 its reverse (5300125212), we get a palindrome (217821128712).

The spelling of 212521003500 in words is "two hundred twelve billion, five hundred twenty-one million, three thousand, five hundred".