212040211530 has 64 divisors (see below), whose sum is σ = 595121522688. Its totient is φ = 47339208000.

The previous prime is 212040211507. The next prime is 212040211531. The reversal of 212040211530 is 35112040212.

212040211530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212040211530² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212040211497 and 212040211506.

It is not an unprimeable number, because it can be changed into a prime (212040211531) 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 31 ways as a sum of consecutive naturals, for example, 11731846 + ... + 11749905.

It is an arithmetic number, because the mean of its divisors is an integer number (9298773792).

Almost surely, 2^212040211530 is an apocalyptic number.

212040211530 is an abundant number, since it is smaller than the sum of its proper divisors (383081311158).

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

212040211530 is a wasteful number, since it uses less digits than its factorization.

212040211530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23481811.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 212040211530 its reverse (35112040212), we get a palindrome (247152251742).

The spelling of 212040211530 in words is "two hundred twelve billion, forty million, two hundred eleven thousand, five hundred thirty".