212132104021 has 4 divisors (see below), whose sum is σ = 213536952544. Its totient is φ = 210727255500.

The previous prime is 212132103977. The next prime is 212132104099. The reversal of 212132104021 is 120401231212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212132104021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212132104021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212132104721) 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, 702424035 + ... + 702424336.

It is an arithmetic number, because the mean of its divisors is an integer number (53384238136).

Almost surely, 2^212132104021 is an apocalyptic number.

It is an amenable number.

212132104021 is a deficient number, since it is larger than the sum of its proper divisors (1404848523).

212132104021 is a wasteful number, since it uses less digits than its factorization.

212132104021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404848522.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212132104021 its reverse (120401231212), we get a palindrome (332533335233).

The spelling of 212132104021 in words is "two hundred twelve billion, one hundred thirty-two million, one hundred four thousand, twenty-one".