213221803013 has 2 divisors, whose sum is σ = 213221803014. Its totient is φ = 213221803012.

The previous prime is 213221803001. The next prime is 213221803027. The reversal of 213221803013 is 310308122312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206145965089 + 7075837924 = 454033^2 + 84118^2 .

It is a cyclic number.

It is not a de Polignac number, because 213221803013 - 2²⁴ = 213205025797 is a prime.

It is a super-2 number, since 2×213221803013² (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 (213221803033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610901506 + 106610901507.

It is an arithmetic number, because the mean of its divisors is an integer number (106610901507).

Almost surely, 2^213221803013 is an apocalyptic number.

It is an amenable number.

213221803013 is a deficient number, since it is larger than the sum of its proper divisors (1).

213221803013 is an equidigital number, since it uses as much as digits as its factorization.

213221803013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 213221803013 its reverse (310308122312), we get a palindrome (523529925325).

The spelling of 213221803013 in words is "two hundred thirteen billion, two hundred twenty-one million, eight hundred three thousand, thirteen".