121771690241 has 2 divisors, whose sum is σ = 121771690242. Its totient is φ = 121771690240.

The previous prime is 121771690223. The next prime is 121771690253. The reversal of 121771690241 is 142096177121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110476464400 + 11295225841 = 332380^2 + 106279^2 .

It is an emirp because it is prime and its reverse (142096177121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121771690241 - 2²² = 121767495937 is a prime.

It is not a weakly prime, because it can be changed into another prime (121771650241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60885845120 + 60885845121.

It is an arithmetic number, because the mean of its divisors is an integer number (60885845121).

Almost surely, 2^121771690241 is an apocalyptic number.

It is an amenable number.

121771690241 is a deficient number, since it is larger than the sum of its proper divisors (1).

121771690241 is an equidigital number, since it uses as much as digits as its factorization.

121771690241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 121771690241 in words is "one hundred twenty-one billion, seven hundred seventy-one million, six hundred ninety thousand, two hundred forty-one".