121443450515 has 4 divisors (see below), whose sum is σ = 145732140624. Its totient is φ = 97154760408.

The previous prime is 121443450461. The next prime is 121443450563. The reversal of 121443450515 is 515054344121.

It is a happy number.

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 121443450515 - 2¹² = 121443446419 is a prime.

It is a super-3 number, since 3×121443450515³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12144345047 + ... + 12144345056.

It is an arithmetic number, because the mean of its divisors is an integer number (36433035156).

Almost surely, 2^121443450515 is an apocalyptic number.

121443450515 is a deficient number, since it is larger than the sum of its proper divisors (24288690109).

121443450515 is an equidigital number, since it uses as much as digits as its factorization.

121443450515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24288690108.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 121443450515 its reverse (515054344121), we get a palindrome (636497794636).

The spelling of 121443450515 in words is "one hundred twenty-one billion, four hundred forty-three million, four hundred fifty thousand, five hundred fifteen".