213101033332221 has 12 divisors (see below), whose sum is σ = 307815778256220. Its totient is φ = 142065890376000.

The previous prime is 213101033332217. The next prime is 213101033332277. The reversal of 213101033332221 is 122233330101312.

213101033332221 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 0 + 1 + 0 + 333 + 322 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190944337064121 + 22156696268100 = 13818261^2 + 4707090^2 .

It is not a de Polignac number, because 213101033332221 - 2² = 213101033332217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213101033312221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121176726 + ... + 122922743.

It is an arithmetic number, because the mean of its divisors is an integer number (25651314854685).

Almost surely, 2^{213101033332221} is an apocalyptic number.

It is an amenable number.

213101033332221 is a deficient number, since it is larger than the sum of its proper divisors (94714744923999).

213101033332221 is a wasteful number, since it uses less digits than its factorization.

213101033332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244196476 (or 244196473 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 213101033332221 its reverse (122233330101312), we get a palindrome (335334363433533).

The spelling of 213101033332221 in words is "two hundred thirteen trillion, one hundred one billion, thirty-three million, three hundred thirty-two thousand, two hundred twenty-one".