121301132321981 has 2 divisors, whose sum is σ = 121301132321982. Its totient is φ = 121301132321980.

The previous prime is 121301132321909. The next prime is 121301132322031. The reversal of 121301132321981 is 189123231103121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109229044612900 + 12072087709081 = 10451270^2 + 3474491^2 .

It is a cyclic number.

It is not a de Polignac number, because 121301132321981 - 2¹⁰ = 121301132320957 is a prime.

It is a super-2 number, since 2×121301132321981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121301132321081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60650566160990 + 60650566160991.

It is an arithmetic number, because the mean of its divisors is an integer number (60650566160991).

Almost surely, 2^{121301132321981} is an apocalyptic number.

It is an amenable number.

121301132321981 is a deficient number, since it is larger than the sum of its proper divisors (1).

121301132321981 is an equidigital number, since it uses as much as digits as its factorization.

121301132321981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 121301132321981 in words is "one hundred twenty-one trillion, three hundred one billion, one hundred thirty-two million, three hundred twenty-one thousand, nine hundred eighty-one".