221312213267 has 2 divisors, whose sum is σ = 221312213268. Its totient is φ = 221312213266.

The previous prime is 221312213203. The next prime is 221312213323. The reversal of 221312213267 is 762312213122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221312213267 - 2⁶ = 221312213203 is a prime.

It is a super-2 number, since 2×221312213267² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221312219267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656106633 + 110656106634.

It is an arithmetic number, because the mean of its divisors is an integer number (110656106634).

Almost surely, 2^221312213267 is an apocalyptic number.

221312213267 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312213267 is an equidigital number, since it uses as much as digits as its factorization.

221312213267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

Adding to 221312213267 its reverse (762312213122), we get a palindrome (983624426389).

The spelling of 221312213267 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred thirteen thousand, two hundred sixty-seven".