121340421973 has 2 divisors, whose sum is σ = 121340421974. Its totient is φ = 121340421972.

The previous prime is 121340421959. The next prime is 121340422001. The reversal of 121340421973 is 379124043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105343737489 + 15996684484 = 324567^2 + 126478^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340421973 - 2¹⁷ = 121340290901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121340421913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670210986 + 60670210987.

It is an arithmetic number, because the mean of its divisors is an integer number (60670210987).

Almost surely, 2^121340421973 is an apocalyptic number.

It is an amenable number.

121340421973 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340421973 is an equidigital number, since it uses as much as digits as its factorization.

121340421973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 121340421973 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-one thousand, nine hundred seventy-three".