121291612448 has 24 divisors (see below), whose sum is σ = 239863696128. Its totient is φ = 60373848384.

The previous prime is 121291612447. The next prime is 121291612457. The reversal of 121291612448 is 844216192121.

It is a super-5 number, since 5×121291612448⁵ (a number of 57 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (121291612447) 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, 8491436 + ... + 8505707.

It is an arithmetic number, because the mean of its divisors is an integer number (9994320672).

Almost surely, 2^121291612448 is an apocalyptic number.

It is an amenable number.

121291612448 is a deficient number, since it is larger than the sum of its proper divisors (118572083680).

121291612448 is a wasteful number, since it uses less digits than its factorization.

121291612448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16997376 (or 16997368 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The spelling of 121291612448 in words is "one hundred twenty-one billion, two hundred ninety-one million, six hundred twelve thousand, four hundred forty-eight".