121448655889 has 8 divisors (see below), whose sum is σ = 138249853632. Its totient is φ = 105607526640.

The previous prime is 121448655851. The next prime is 121448655919. The reversal of 121448655889 is 988556844121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-121448655889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121448655089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240016854 + ... + 240017359.

It is an arithmetic number, because the mean of its divisors is an integer number (17281231704).

Almost surely, 2^121448655889 is an apocalyptic number.

It is an amenable number.

121448655889 is a deficient number, since it is larger than the sum of its proper divisors (16801197743).

121448655889 is a wasteful number, since it uses less digits than its factorization.

121448655889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480034247.

The product of its digits is 22118400, while the sum is 61.

The spelling of 121448655889 in words is "one hundred twenty-one billion, four hundred forty-eight million, six hundred fifty-five thousand, eight hundred eighty-nine".