212120110520 has 128 divisors (see below), whose sum is σ = 519392554560. Its totient is φ = 77640376320.

The previous prime is 212120110513. The next prime is 212120110577. The reversal of 212120110520 is 25011021212.

212120110520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47977910 + ... + 47982330.

Almost surely, 2^212120110520 is an apocalyptic number.

212120110520 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 212120110520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259696277280).

212120110520 is an abundant number, since it is smaller than the sum of its proper divisors (307272444040).

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

212120110520 is a wasteful number, since it uses less digits than its factorization.

212120110520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 212120110520 its reverse (25011021212), we get a palindrome (237131131732).

The spelling of 212120110520 in words is "two hundred twelve billion, one hundred twenty million, one hundred ten thousand, five hundred twenty".