1221331010219 has 2 divisors, whose sum is σ = 1221331010220. Its totient is φ = 1221331010218.

The previous prime is 1221331010201. The next prime is 1221331010287. The reversal of 1221331010219 is 9120101331221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9120101331221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221331010219 - 2³⁶ = 1152611533483 is a prime.

It is a super-2 number, since 2×1221331010219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221331013219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610665505109 + 610665505110.

It is an arithmetic number, because the mean of its divisors is an integer number (610665505110).

Almost surely, 2^{1221331010219} is an apocalyptic number.

1221331010219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221331010219 is an equidigital number, since it uses as much as digits as its factorization.

1221331010219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 1221331010219 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, ten thousand, two hundred nineteen".