1321201222219 has 2 divisors, whose sum is σ = 1321201222220. Its totient is φ = 1321201222218.

The previous prime is 1321201222171. The next prime is 1321201222247. The reversal of 1321201222219 is 9122221021231.

It is an a-pointer prime, because the next prime (1321201222247) can be obtained adding 1321201222219 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321201222219 - 2²¹ = 1321199125067 is a prime.

It is a super-2 number, since 2×1321201222219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321201222619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660600611109 + 660600611110.

It is an arithmetic number, because the mean of its divisors is an integer number (660600611110).

Almost surely, 2^{1321201222219} is an apocalyptic number.

1321201222219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321201222219 is an equidigital number, since it uses as much as digits as its factorization.

1321201222219 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 28.

The spelling of 1321201222219 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred nineteen".