212111003221 has 8 divisors (see below), whose sum is σ = 232171943864. Its totient is φ = 192585021120.

The previous prime is 212111003219. The next prime is 212111003233. The reversal of 212111003221 is 122300111212.

It can be written as a sum of positive squares in 4 ways, for example, as 929396196 + 211181607025 = 30486^2 + 459545^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 212111003221 - 2¹ = 212111003219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212111003195 and 212111003204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111000221) 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, 133738806 + ... + 133740391.

It is an arithmetic number, because the mean of its divisors is an integer number (29021492983).

Almost surely, 2^212111003221 is an apocalyptic number.

It is an amenable number.

212111003221 is a deficient number, since it is larger than the sum of its proper divisors (20060940643).

212111003221 is a wasteful number, since it uses less digits than its factorization.

212111003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267479271.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212111003221 its reverse (122300111212), we get a palindrome (334411114433).

The spelling of 212111003221 in words is "two hundred twelve billion, one hundred eleven million, three thousand, two hundred twenty-one".