121556225633 has 2 divisors, whose sum is σ = 121556225634. Its totient is φ = 121556225632.

The previous prime is 121556225627. The next prime is 121556225669. The reversal of 121556225633 is 336522655121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114885746704 + 6670478929 = 338948^2 + 81673^2 .

It is a cyclic number.

It is not a de Polignac number, because 121556225633 - 2⁶ = 121556225569 is a prime.

It is not a weakly prime, because it can be changed into another prime (121556225533) 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, 60778112816 + 60778112817.

It is an arithmetic number, because the mean of its divisors is an integer number (60778112817).

Almost surely, 2^121556225633 is an apocalyptic number.

It is an amenable number.

121556225633 is a deficient number, since it is larger than the sum of its proper divisors (1).

121556225633 is an equidigital number, since it uses as much as digits as its factorization.

121556225633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 41.

The spelling of 121556225633 in words is "one hundred twenty-one billion, five hundred fifty-six million, two hundred twenty-five thousand, six hundred thirty-three".