121816463 has 4 divisors (see below), whose sum is σ = 124649448. Its totient is φ = 118983480.

The previous prime is 121816459. The next prime is 121816489. The reversal of 121816463 is 364618121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364618121 = 7 ⋅52088303.

It is a cyclic number.

It is not a de Polignac number, because 121816463 - 2² = 121816459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121816493) 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, 1416428 + ... + 1416513.

It is an arithmetic number, because the mean of its divisors is an integer number (31162362).

Almost surely, 2^121816463 is an apocalyptic number.

121816463 is a deficient number, since it is larger than the sum of its proper divisors (2832985).

121816463 is an equidigital number, since it uses as much as digits as its factorization.

121816463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832984.

The product of its digits is 6912, while the sum is 32.

The square root of 121816463 is about 11037.0495604577. The cubic root of 121816463 is about 495.7187300859.

The spelling of 121816463 in words is "one hundred twenty-one million, eight hundred sixteen thousand, four hundred sixty-three".