221221210112219 has 2 divisors, whose sum is σ = 221221210112220. Its totient is φ = 221221210112218.

The previous prime is 221221210112083. The next prime is 221221210112263. The reversal of 221221210112219 is 912211012122122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221221210112219 - 2¹² = 221221210108123 is a prime.

It is a super-2 number, since 2×221221210112219² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 221221210112191 and 221221210112200.

It is not a weakly prime, because it can be changed into another prime (221221210612219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610605056109 + 110610605056110.

It is an arithmetic number, because the mean of its divisors is an integer number (110610605056110).

Almost surely, 2^{221221210112219} is an apocalyptic number.

221221210112219 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221210112219 is an equidigital number, since it uses as much as digits as its factorization.

221221210112219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 221221210112219 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, two hundred nineteen".