212240020520 has 64 divisors (see below), whose sum is σ = 521003448000. Its totient is φ = 77170682880.

The previous prime is 212240020507. The next prime is 212240020529. The reversal of 212240020520 is 25020042212.

212240020520 is digitally balanced in base 2, 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 212240020492 and 212240020501.

It is not an unprimeable number, because it can be changed into a prime (212240020529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6679631 + ... + 6711329.

It is an arithmetic number, because the mean of its divisors is an integer number (8140678875).

Almost surely, 2^212240020520 is an apocalyptic number.

212240020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212240020520 is an abundant number, since it is smaller than the sum of its proper divisors (308763427480).

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

212240020520 is a wasteful number, since it uses less digits than its factorization.

212240020520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46938 (or 46934 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 212240020520 its reverse (25020042212), we get a palindrome (237260062732).

The spelling of 212240020520 in words is "two hundred twelve billion, two hundred forty million, twenty thousand, five hundred twenty".