121681380473 has 2 divisors, whose sum is σ = 121681380474. Its totient is φ = 121681380472.

The previous prime is 121681380467. The next prime is 121681380479. The reversal of 121681380473 is 374083186121.

It is a balanced prime because it is at equal distance from previous prime (121681380467) and next prime (121681380479).

It can be written as a sum of positive squares in only one way, i.e., 65754806329 + 55926574144 = 256427^2 + 236488^2 .

It is a cyclic number.

It is not a de Polignac number, because 121681380473 - 2⁸ = 121681380217 is a prime.

It is not a weakly prime, because it can be changed into another prime (121681380479) 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, 60840690236 + 60840690237.

It is an arithmetic number, because the mean of its divisors is an integer number (60840690237).

Almost surely, 2^121681380473 is an apocalyptic number.

It is an amenable number.

121681380473 is a deficient number, since it is larger than the sum of its proper divisors (1).

121681380473 is an equidigital number, since it uses as much as digits as its factorization.

121681380473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 121681380473 in words is "one hundred twenty-one billion, six hundred eighty-one million, three hundred eighty thousand, four hundred seventy-three".