121671152016161 has 4 divisors (see below), whose sum is σ = 132732165835824. Its totient is φ = 110610138196500.

The previous prime is 121671152016151. The next prime is 121671152016173. The reversal of 121671152016161 is 161610251176121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121671152016161 - 2¹⁴ = 121671151999777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121671152016151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530506909815 + ... + 5530506909836.

It is an arithmetic number, because the mean of its divisors is an integer number (33183041458956).

Almost surely, 2^{121671152016161} is an apocalyptic number.

121671152016161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121671152016161 is a deficient number, since it is larger than the sum of its proper divisors (11061013819663).

121671152016161 is a wasteful number, since it uses less digits than its factorization.

121671152016161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061013819662.

The product of its (nonzero) digits is 30240, while the sum is 41.

The spelling of 121671152016161 in words is "one hundred twenty-one trillion, six hundred seventy-one billion, one hundred fifty-two million, sixteen thousand, one hundred sixty-one".