121671053563 has 2 divisors, whose sum is σ = 121671053564. Its totient is φ = 121671053562.

The previous prime is 121671053551. The next prime is 121671053591. The reversal of 121671053563 is 365350176121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121671053563 - 2¹³ = 121671045371 is a prime.

It is not a weakly prime, because it can be changed into another prime (121671053263) 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, 60835526781 + 60835526782.

It is an arithmetic number, because the mean of its divisors is an integer number (60835526782).

Almost surely, 2^121671053563 is an apocalyptic number.

121671053563 is a deficient number, since it is larger than the sum of its proper divisors (1).

121671053563 is an equidigital number, since it uses as much as digits as its factorization.

121671053563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 121671053563 in words is "one hundred twenty-one billion, six hundred seventy-one million, fifty-three thousand, five hundred sixty-three".