213100111311221 has 8 divisors (see below), whose sum is σ = 214458830042880. Its totient is φ = 211741410215088.

The previous prime is 213100111311193. The next prime is 213100111311251. The reversal of 213100111311221 is 122113111001312.

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 213100111311221 - 2²² = 213100107116917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213100111311193 and 213100111311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213100111311251) 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, 20274440 + ... + 28935326.

It is an arithmetic number, because the mean of its divisors is an integer number (26807353755360).

Almost surely, 2^{213100111311221} is an apocalyptic number.

It is an amenable number.

213100111311221 is a deficient number, since it is larger than the sum of its proper divisors (1358718731659).

213100111311221 is a wasteful number, since it uses less digits than its factorization.

213100111311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817763.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 213100111311221 its reverse (122113111001312), we get a palindrome (335213222312533).

The spelling of 213100111311221 in words is "two hundred thirteen trillion, one hundred billion, one hundred eleven million, three hundred eleven thousand, two hundred twenty-one".