211221021110122 has 8 divisors (see below), whose sum is σ = 317223165204900. Its totient is φ = 105479966041824.

The previous prime is 211221021110111. The next prime is 211221021110137. The reversal of 211221021110122 is 221011120122112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 185117004504441 + 26104016605681 = 13605771^2 + 5109209^2 .

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

It is a super-3 number, since 3×211221021110122³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 211221021110122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65272254597 + ... + 65272257832.

Almost surely, 2^{211221021110122} is an apocalyptic number.

211221021110122 is a deficient number, since it is larger than the sum of its proper divisors (106002144094778).

211221021110122 is a wasteful number, since it uses less digits than its factorization.

211221021110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130544513240.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211221021110122 its reverse (221011120122112), we get a palindrome (432232141232234).

The spelling of 211221021110122 in words is "two hundred eleven trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred twenty-two".