212135300566 has 16 divisors (see below), whose sum is σ = 363676358304. Its totient is φ = 90911168064.

The previous prime is 212135300539. The next prime is 212135300579. The reversal of 212135300566 is 665003531212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15226 + ... + 651538.

It is an arithmetic number, because the mean of its divisors is an integer number (22729772394).

Almost surely, 2^212135300566 is an apocalyptic number.

212135300566 is a deficient number, since it is larger than the sum of its proper divisors (151541057738).

212135300566 is a wasteful number, since it uses less digits than its factorization.

212135300566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660135.

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 212135300566 its reverse (665003531212), we get a palindrome (877138831778).

The spelling of 212135300566 in words is "two hundred twelve billion, one hundred thirty-five million, three hundred thousand, five hundred sixty-six".