212202005566 has 32 divisors (see below), whose sum is σ = 338469120000. Its totient is φ = 99617243040.

The previous prime is 212202005563. The next prime is 212202005569. The reversal of 212202005566 is 665500202212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212202005563) and next prime (212202005569).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202005563) 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, 130135 + ... + 664333.

It is an arithmetic number, because the mean of its divisors is an integer number (10577160000).

Almost surely, 2^212202005566 is an apocalyptic number.

212202005566 is a deficient number, since it is larger than the sum of its proper divisors (126267114434).

212202005566 is a wasteful number, since it uses less digits than its factorization.

212202005566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534424.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 212202005566 its reverse (665500202212), we get a palindrome (877702207778).

The spelling of 212202005566 in words is "two hundred twelve billion, two hundred two million, five thousand, five hundred sixty-six".