213320320200121 has 4 divisors (see below), whose sum is σ = 220676193310500. Its totient is φ = 205964447089744.

The previous prime is 213320320200101. The next prime is 213320320200151. The reversal of 213320320200121 is 121002023023312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177051259335721 + 36269060864400 = 13306061^2 + 6022380^2 .

It is a cyclic number.

It is not a de Polignac number, because 213320320200121 - 2²⁵ = 213320286645689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213320320200092 and 213320320200101.

It is not an unprimeable number, because it can be changed into a prime (213320320200101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3677936555146 + ... + 3677936555203.

It is an arithmetic number, because the mean of its divisors is an integer number (55169048327625).

Almost surely, 2^{213320320200121} is an apocalyptic number.

It is an amenable number.

213320320200121 is a deficient number, since it is larger than the sum of its proper divisors (7355873110379).

213320320200121 is an equidigital number, since it uses as much as digits as its factorization.

213320320200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355873110378.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 213320320200121 its reverse (121002023023312), we get a palindrome (334322343223433).

The spelling of 213320320200121 in words is "two hundred thirteen trillion, three hundred twenty billion, three hundred twenty million, two hundred thousand, one hundred twenty-one".