212603551066 has 4 divisors (see below), whose sum is σ = 318905326602. Its totient is φ = 106301775532.

The previous prime is 212603551049. The next prime is 212603551079. The reversal of 212603551066 is 660155306212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 168076220841 + 44527330225 = 409971^2 + 211015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53150887765 + ... + 53150887768.

Almost surely, 2^212603551066 is an apocalyptic number.

212603551066 is a deficient number, since it is larger than the sum of its proper divisors (106301775536).

212603551066 is a wasteful number, since it uses less digits than its factorization.

212603551066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106301775535.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 212603551066 its reverse (660155306212), we get a palindrome (872758857278).

The spelling of 212603551066 in words is "two hundred twelve billion, six hundred three million, five hundred fifty-one thousand, sixty-six".