121665330311467 has 4 divisors (see below), whose sum is σ = 121673313092296. Its totient is φ = 121657347530640.

The previous prime is 121665330311461. The next prime is 121665330311471. The reversal of 121665330311467 is 764113033566121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121665330311467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121665330311467.

It is not an unprimeable number, because it can be changed into a prime (121665330311461) 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, 3991367553 + ... + 3991398034.

It is an arithmetic number, because the mean of its divisors is an integer number (30418328273074).

Almost surely, 2^{121665330311467} is an apocalyptic number.

121665330311467 is a deficient number, since it is larger than the sum of its proper divisors (7982780829).

121665330311467 is an equidigital number, since it uses as much as digits as its factorization.

121665330311467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982780828.

The product of its (nonzero) digits is 1632960, while the sum is 49.

Adding to 121665330311467 its reverse (764113033566121), we get a palindrome (885778363877588).

The spelling of 121665330311467 in words is "one hundred twenty-one trillion, six hundred sixty-five billion, three hundred thirty million, three hundred eleven thousand, four hundred sixty-seven".