212448497221 has 16 divisors (see below), whose sum is σ = 222122880000. Its totient is φ = 202932269568.

The previous prime is 212448497197. The next prime is 212448497237. The reversal of 212448497221 is 122794844212.

It is a cyclic number.

It is not a de Polignac number, because 212448497221 - 2³⁵ = 178088758853 is a prime.

It is a super-2 number, since 2×212448497221² (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 (212448497281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8423596 + ... + 8448778.

It is an arithmetic number, because the mean of its divisors is an integer number (13882680000).

Almost surely, 2^212448497221 is an apocalyptic number.

It is an amenable number.

212448497221 is a deficient number, since it is larger than the sum of its proper divisors (9674382779).

212448497221 is a wasteful number, since it uses less digits than its factorization.

212448497221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308.

The product of its digits is 516096, while the sum is 46.

The spelling of 212448497221 in words is "two hundred twelve billion, four hundred forty-eight million, four hundred ninety-seven thousand, two hundred twenty-one".