121437724648 has 32 divisors (see below), whose sum is σ = 243055512000. Its totient is φ = 56712942720.

The previous prime is 121437724637. The next prime is 121437724657. The reversal of 121437724648 is 846427734121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5615493 + ... + 5637076.

It is an arithmetic number, because the mean of its divisors is an integer number (7595484750).

Almost surely, 2^121437724648 is an apocalyptic number.

It is an amenable number.

121437724648 is an abundant number, since it is smaller than the sum of its proper divisors (121617787352).

121437724648 is a wasteful number, since it uses less digits than its factorization.

121437724648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252665 (or 11252661 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The spelling of 121437724648 in words is "one hundred twenty-one billion, four hundred thirty-seven million, seven hundred twenty-four thousand, six hundred forty-eight".