121478914138843 has 4 divisors (see below), whose sum is σ = 121479412241128. Its totient is φ = 121478416036560.

The previous prime is 121478914138831. The next prime is 121478914138847. The reversal of 121478914138843 is 348831419874121.

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

It is a cyclic number.

It is not a de Polignac number, because 121478914138843 - 2⁹ = 121478914138331 is a prime.

It is a super-3 number, since 3×121478914138843³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121478914138847) 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, 248685138 + ... + 249173143.

It is an arithmetic number, because the mean of its divisors is an integer number (30369853060282).

Almost surely, 2^{121478914138843} is an apocalyptic number.

121478914138843 is a deficient number, since it is larger than the sum of its proper divisors (498102285).

121478914138843 is an equidigital number, since it uses as much as digits as its factorization.

121478914138843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498102284.

The product of its digits is 37158912, while the sum is 64.

The spelling of 121478914138843 in words is "one hundred twenty-one trillion, four hundred seventy-eight billion, nine hundred fourteen million, one hundred thirty-eight thousand, eight hundred forty-three".