121245577447 has 8 divisors (see below), whose sum is σ = 128390070816. Its totient is φ = 114102461952.

The previous prime is 121245577417. The next prime is 121245577459. The reversal of 121245577447 is 744775542121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121245577447 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 121245577447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121245577417) 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, 160483 + ... + 517924.

It is an arithmetic number, because the mean of its divisors is an integer number (16048758852).

Almost surely, 2^121245577447 is an apocalyptic number.

121245577447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121245577447 is a deficient number, since it is larger than the sum of its proper divisors (7144493369).

121245577447 is a wasteful number, since it uses less digits than its factorization.

121245577447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688937.

The product of its digits is 2195200, while the sum is 49.

The spelling of 121245577447 in words is "one hundred twenty-one billion, two hundred forty-five million, five hundred seventy-seven thousand, four hundred forty-seven".