212110103221 has 4 divisors (see below), whose sum is σ = 212120970732. Its totient is φ = 212099235712.

The previous prime is 212110103213. The next prime is 212110103281. The reversal of 212110103221 is 122301011212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192269972196 + 19840131025 = 438486^2 + 140855^2 .

It is a cyclic number.

It is not a de Polignac number, because 212110103221 - 2³ = 212110103213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212110103195 and 212110103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110103201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5404426 + ... + 5443531.

It is an arithmetic number, because the mean of its divisors is an integer number (53030242683).

Almost surely, 2^212110103221 is an apocalyptic number.

It is an amenable number.

212110103221 is a deficient number, since it is larger than the sum of its proper divisors (10867511).

212110103221 is a wasteful number, since it uses less digits than its factorization.

212110103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10867510.

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

Adding to 212110103221 its reverse (122301011212), we get a palindrome (334411114433).

The spelling of 212110103221 in words is "two hundred twelve billion, one hundred ten million, one hundred three thousand, two hundred twenty-one".