213406222061 has 2 divisors, whose sum is σ = 213406222062. Its totient is φ = 213406222060.

The previous prime is 213406222019. The next prime is 213406222063. The reversal of 213406222061 is 160222604312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114527419561 + 98878802500 = 338419^2 + 314450^2 .

It is a cyclic number.

It is not a de Polignac number, because 213406222061 - 2¹⁰ = 213406221037 is a prime.

It is a super-2 number, since 2×213406222061² (a number of 23 digits) contains 22 as substring.

Together with 213406222063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213406222063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106703111030 + 106703111031.

It is an arithmetic number, because the mean of its divisors is an integer number (106703111031).

Almost surely, 2^213406222061 is an apocalyptic number.

It is an amenable number.

213406222061 is a deficient number, since it is larger than the sum of its proper divisors (1).

213406222061 is an equidigital number, since it uses as much as digits as its factorization.

213406222061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 213406222061 its reverse (160222604312), we get a palindrome (373628826373).

The spelling of 213406222061 in words is "two hundred thirteen billion, four hundred six million, two hundred twenty-two thousand, sixty-one".