121101121120981 has 2 divisors, whose sum is σ = 121101121120982. Its totient is φ = 121101121120980.

The previous prime is 121101121120979. The next prime is 121101121121027. The reversal of 121101121120981 is 189021121101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114734411302225 + 6366709818756 = 10711415^2 + 2523234^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101121120981 - 2¹ = 121101121120979 is a prime.

It is a super-2 number, since 2×121101121120981² (a number of 29 digits) contains 22 as substring.

Together with 121101121120979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101121120781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550560560490 + 60550560560491.

It is an arithmetic number, because the mean of its divisors is an integer number (60550560560491).

Almost surely, 2^{121101121120981} is an apocalyptic number.

It is an amenable number.

121101121120981 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101121120981 is an equidigital number, since it uses as much as digits as its factorization.

121101121120981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 31.

The spelling of 121101121120981 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty thousand, nine hundred eighty-one".