212052215501 has 4 divisors (see below), whose sum is σ = 242345389152. Its totient is φ = 181759041852.

The previous prime is 212052215491. The next prime is 212052215509. The reversal of 212052215501 is 105512250212.

It is a happy number.

212052215501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212052215501 - 2²⁶ = 211985106637 is a prime.

It is a super-2 number, since 2×212052215501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212052215509) 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 3 ways as a sum of consecutive naturals, for example, 15146586815 + ... + 15146586828.

It is an arithmetic number, because the mean of its divisors is an integer number (60586347288).

Almost surely, 2^212052215501 is an apocalyptic number.

It is an amenable number.

212052215501 is a deficient number, since it is larger than the sum of its proper divisors (30293173651).

212052215501 is an equidigital number, since it uses as much as digits as its factorization.

212052215501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30293173650.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 212052215501 its reverse (105512250212), we get a palindrome (317564465713).

The spelling of 212052215501 in words is "two hundred twelve billion, fifty-two million, two hundred fifteen thousand, five hundred one".