221220101213213 has 8 divisors (see below), whose sum is σ = 234350340842232. Its totient is φ = 208102894084096.

The previous prime is 221220101213201. The next prime is 221220101213291. The reversal of 221220101213213 is 312312101022122.

It can be written as a sum of positive squares in 4 ways, for example, as 36871649273209 + 184348451940004 = 6072203^2 + 13577498^2 .

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 221220101213213 - 2⁴⁶ = 150851357035549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220101713213) 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, 3258090020 + ... + 3258157917.

It is an arithmetic number, because the mean of its divisors is an integer number (29293792605279).

Almost surely, 2^{221220101213213} is an apocalyptic number.

It is an amenable number.

221220101213213 is a deficient number, since it is larger than the sum of its proper divisors (13130239629019).

221220101213213 is a wasteful number, since it uses less digits than its factorization.

221220101213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516249951.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 221220101213213 its reverse (312312101022122), we get a palindrome (533532202235335).

The spelling of 221220101213213 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred thirteen thousand, two hundred thirteen".