212201312129 has 4 divisors (see below), whose sum is σ = 212202235860. Its totient is φ = 212200388400.

The previous prime is 212201312123. The next prime is 212201312143. The reversal of 212201312129 is 921213102212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 136510297729 + 75691014400 = 369473^2 + 275120^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201312129 - 2²⁰ = 212200263553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201312098 and 212201312107.

It is not an unprimeable number, because it can be changed into a prime (212201312123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180779 + ... + 676079.

It is an arithmetic number, because the mean of its divisors is an integer number (53050558965).

Almost surely, 2^212201312129 is an apocalyptic number.

It is an amenable number.

212201312129 is a deficient number, since it is larger than the sum of its proper divisors (923731).

212201312129 is an equidigital number, since it uses as much as digits as its factorization.

212201312129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923730.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 212201312129 in words is "two hundred twelve billion, two hundred one million, three hundred twelve thousand, one hundred twenty-nine".