1221022119893 has 2 divisors, whose sum is σ = 1221022119894. Its totient is φ = 1221022119892.

The previous prime is 1221022119839. The next prime is 1221022119929. The reversal of 1221022119893 is 3989112201221.

Together with previous prime (1221022119839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680653050289 + 540369069604 = 825017^2 + 735098^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221022119893 - 2⁸ = 1221022119637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221022119893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221022139893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511059946 + 610511059947.

It is an arithmetic number, because the mean of its divisors is an integer number (610511059947).

Almost surely, 2^{1221022119893} is an apocalyptic number.

It is an amenable number.

1221022119893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022119893 is an equidigital number, since it uses as much as digits as its factorization.

1221022119893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 1221022119893 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred nineteen thousand, eight hundred ninety-three".