213112113102221 has 8 divisors (see below), whose sum is σ = 221156266624920. Its totient is φ = 205114323577408.

The previous prime is 213112113102197. The next prime is 213112113102319. The reversal of 213112113102221 is 122201311211312.

It can be written as a sum of positive squares in 4 ways, for example, as 37841124492196 + 175270988610025 = 6151514^2 + 13238995^2 .

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-213112113102221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213112133102221) 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, 11590990106 + ... + 11591008491.

It is an arithmetic number, because the mean of its divisors is an integer number (27644533328115).

Almost surely, 2^{213112113102221} is an apocalyptic number.

It is an amenable number.

213112113102221 is a deficient number, since it is larger than the sum of its proper divisors (8044153522699).

213112113102221 is a wasteful number, since it uses less digits than its factorization.

213112113102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23181998943.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 213112113102221 its reverse (122201311211312), we get a palindrome (335313424313533).

The spelling of 213112113102221 in words is "two hundred thirteen trillion, one hundred twelve billion, one hundred thirteen million, one hundred two thousand, two hundred twenty-one".