220121110213 has 2 divisors, whose sum is σ = 220121110214. Its totient is φ = 220121110212.

The previous prime is 220121110201. The next prime is 220121110271. The reversal of 220121110213 is 312011121022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216171993249 + 3949116964 = 464943^2 + 62842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220121110213 is a prime.

It is a super-2 number, since 2×220121110213² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121110273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060555106 + 110060555107.

It is an arithmetic number, because the mean of its divisors is an integer number (110060555107).

Almost surely, 2^220121110213 is an apocalyptic number.

It is an amenable number.

220121110213 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121110213 is an equidigital number, since it uses as much as digits as its factorization.

220121110213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 220121110213 its reverse (312011121022), we get a palindrome (532132231235).

The spelling of 220121110213 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred ten thousand, two hundred thirteen".