1221117108073 has 2 divisors, whose sum is σ = 1221117108074. Its totient is φ = 1221117108072.

The previous prime is 1221117108049. The next prime is 1221117108119. The reversal of 1221117108073 is 3708017111221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217343708889 + 3773399184 = 1103333^2 + 61428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221117108073 - 2²⁹ = 1220580237161 is a prime.

It is a super-2 number, since 2×1221117108073² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221117108473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610558554036 + 610558554037.

It is an arithmetic number, because the mean of its divisors is an integer number (610558554037).

Almost surely, 2^{1221117108073} is an apocalyptic number.

It is an amenable number.

1221117108073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221117108073 is an equidigital number, since it uses as much as digits as its factorization.

1221117108073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 34.

The spelling of 1221117108073 in words is "one trillion, two hundred twenty-one billion, one hundred seventeen million, one hundred eight thousand, seventy-three".