213320101221 has 24 divisors (see below), whose sum is σ = 309283465920. Its totient is φ = 141681246336.

The previous prime is 213320101219. The next prime is 213320101249. The reversal of 213320101221 is 122101023312.

213320101221 is a `hidden beast` number, since 21 + 3 + 320 + 101 + 221 = 666.

It is not a de Polignac number, because 213320101221 - 2¹ = 213320101219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213320101194 and 213320101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213320101721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3973866 + ... + 4027188.

It is an arithmetic number, because the mean of its divisors is an integer number (12886811080).

Almost surely, 2^213320101221 is an apocalyptic number.

It is an amenable number.

213320101221 is a deficient number, since it is larger than the sum of its proper divisors (95963364699).

213320101221 is a wasteful number, since it uses less digits than its factorization.

213320101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54985 (or 54982 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213320101221 its reverse (122101023312), we get a palindrome (335421124533).

The spelling of 213320101221 in words is "two hundred thirteen billion, three hundred twenty million, one hundred one thousand, two hundred twenty-one".