212103605170 has 16 divisors (see below), whose sum is σ = 381791824920. Its totient is φ = 84840256384.

The previous prime is 212103605123. The next prime is 212103605173. The reversal of 212103605170 is 71506301212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 155135940129 + 56967665041 = 393873^2 + 238679^2 .

It is a super-2 number, since 2×212103605170² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212103605173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119276 + ... + 1294984.

Almost surely, 2^212103605170 is an apocalyptic number.

212103605170 is a deficient number, since it is larger than the sum of its proper divisors (169688219750).

212103605170 is a wasteful number, since it uses less digits than its factorization.

212103605170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296429.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 212103605170 its reverse (71506301212), we get a palindrome (283609906382).

The spelling of 212103605170 in words is "two hundred twelve billion, one hundred three million, six hundred five thousand, one hundred seventy".