212131100202221 has 8 divisors (see below), whose sum is σ = 212670594858624. Its totient is φ = 211591631473200.

The previous prime is 212131100202199. The next prime is 212131100202239. The reversal of 212131100202221 is 122202001131212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212131100202221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212131100202193 and 212131100202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131100202251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9955376 + ... + 22877318.

It is an arithmetic number, because the mean of its divisors is an integer number (26583824357328).

Almost surely, 2^{212131100202221} is an apocalyptic number.

It is an amenable number.

212131100202221 is a deficient number, since it is larger than the sum of its proper divisors (539494656403).

212131100202221 is a wasteful number, since it uses less digits than its factorization.

212131100202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963691.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212131100202221 its reverse (122202001131212), we get a palindrome (334333101333433).

The spelling of 212131100202221 in words is "two hundred twelve trillion, one hundred thirty-one billion, one hundred million, two hundred two thousand, two hundred twenty-one".