213113321209 has 2 divisors, whose sum is σ = 213113321210. Its totient is φ = 213113321208.

The previous prime is 213113321159. The next prime is 213113321221. The reversal of 213113321209 is 902123311312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212270289984 + 843031225 = 460728^2 + 29035^2 .

It is a cyclic number.

It is not a de Polignac number, because 213113321209 - 2¹¹ = 213113319161 is a prime.

It is a super-4 number, since 4×213113321209⁴ (a number of 46 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (213113321249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556660604 + 106556660605.

It is an arithmetic number, because the mean of its divisors is an integer number (106556660605).

Almost surely, 2^213113321209 is an apocalyptic number.

It is an amenable number.

213113321209 is a deficient number, since it is larger than the sum of its proper divisors (1).

213113321209 is an equidigital number, since it uses as much as digits as its factorization.

213113321209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 213113321209 in words is "two hundred thirteen billion, one hundred thirteen million, three hundred twenty-one thousand, two hundred nine".