1221022119959 has 2 divisors, whose sum is σ = 1221022119960. Its totient is φ = 1221022119958.

The previous prime is 1221022119953. The next prime is 1221022120027. The reversal of 1221022119959 is 9599112201221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221022119959 - 2²⁰ = 1221021071383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221022119953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511059979 + 610511059980.

It is an arithmetic number, because the mean of its divisors is an integer number (610511059980).

Almost surely, 2^{1221022119959} is an apocalyptic number.

1221022119959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022119959 is an equidigital number, since it uses as much as digits as its factorization.

1221022119959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 1221022119959 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred nineteen thousand, nine hundred fifty-nine".