121216495 has 4 divisors (see below), whose sum is σ = 145459800. Its totient is φ = 96973192.

The previous prime is 121216483. The next prime is 121216507. The reversal of 121216495 is 594612121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 594612121 = 7639 ⋅77839.

It is an interprime number because it is at equal distance from previous prime (121216483) and next prime (121216507).

It is a cyclic number.

It is not a de Polignac number, because 121216495 - 2¹¹ = 121214447 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 12121645 + ... + 12121654.

It is an arithmetic number, because the mean of its divisors is an integer number (36364950).

Almost surely, 2^121216495 is an apocalyptic number.

121216495 is a deficient number, since it is larger than the sum of its proper divisors (24243305).

121216495 is an equidigital number, since it uses as much as digits as its factorization.

121216495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24243304.

The product of its digits is 4320, while the sum is 31.

The square root of 121216495 is about 11009.8362839781. The cubic root of 121216495 is about 494.9035556755.

The spelling of 121216495 in words is "one hundred twenty-one million, two hundred sixteen thousand, four hundred ninety-five".