212721360522 has 16 divisors (see below), whose sum is σ = 464119332192. Its totient is φ = 64461018320.

The previous prime is 212721360521. The next prime is 212721360589. The reversal of 212721360522 is 225063127212.

212721360522 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 2×212721360522² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (212721360521) 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 7 ways as a sum of consecutive naturals, for example, 1611525393 + ... + 1611525524.

It is an arithmetic number, because the mean of its divisors is an integer number (29007458262).

Almost surely, 2^212721360522 is an apocalyptic number.

212721360522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212721360522 is an abundant number, since it is smaller than the sum of its proper divisors (251397971670).

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

212721360522 is a wasteful number, since it uses less digits than its factorization.

212721360522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223050933.

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 212721360522 its reverse (225063127212), we get a palindrome (437784487734).

The spelling of 212721360522 in words is "two hundred twelve billion, seven hundred twenty-one million, three hundred sixty thousand, five hundred twenty-two".