121404555443 has 2 divisors, whose sum is σ = 121404555444. Its totient is φ = 121404555442.

The previous prime is 121404555431. The next prime is 121404555487. The reversal of 121404555443 is 344555404121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121404555443 - 2⁸ = 121404555187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121404555397 and 121404555406.

It is not a weakly prime, because it can be changed into another prime (121404555143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60702277721 + 60702277722.

It is an arithmetic number, because the mean of its divisors is an integer number (60702277722).

Almost surely, 2^121404555443 is an apocalyptic number.

121404555443 is a deficient number, since it is larger than the sum of its proper divisors (1).

121404555443 is an equidigital number, since it uses as much as digits as its factorization.

121404555443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 121404555443 its reverse (344555404121), we get a palindrome (465959959564).

The spelling of 121404555443 in words is "one hundred twenty-one billion, four hundred four million, five hundred fifty-five thousand, four hundred forty-three".