1221101022259 has 2 divisors, whose sum is σ = 1221101022260. Its totient is φ = 1221101022258.

The previous prime is 1221101022209. The next prime is 1221101022307. The reversal of 1221101022259 is 9522201011221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221101022259 - 2²⁹ = 1220564151347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221101022209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610550511129 + 610550511130.

It is an arithmetic number, because the mean of its divisors is an integer number (610550511130).

Almost surely, 2^{1221101022259} is an apocalyptic number.

1221101022259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221101022259 is an equidigital number, since it uses as much as digits as its factorization.

1221101022259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 1221101022259 in words is "one trillion, two hundred twenty-one billion, one hundred one million, twenty-two thousand, two hundred fifty-nine".