212221564653 has 16 divisors (see below), whose sum is σ = 323519114880. Its totient is φ = 121219262976.

The previous prime is 212221564649. The next prime is 212221564661. The reversal of 212221564653 is 356465122212.

212221564653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212221564653 - 2² = 212221564649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221564603) 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, 2039808 + ... + 2141321.

It is an arithmetic number, because the mean of its divisors is an integer number (20219944680).

Almost surely, 2^212221564653 is an apocalyptic number.

It is an amenable number.

212221564653 is a deficient number, since it is larger than the sum of its proper divisors (111297550227).

212221564653 is a wasteful number, since it uses less digits than its factorization.

212221564653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183556.

The product of its digits is 172800, while the sum is 39.

Adding to 212221564653 its reverse (356465122212), we get a palindrome (568686686865).

The spelling of 212221564653 in words is "two hundred twelve billion, two hundred twenty-one million, five hundred sixty-four thousand, six hundred fifty-three".