121456605644 has 48 divisors (see below), whose sum is σ = 232823354400. Its totient is φ = 54981427200.

The previous prime is 121456605623. The next prime is 121456605691. The reversal of 121456605644 is 446506654121.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 121456605595 and 121456605604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11530172 + ... + 11540700.

It is an arithmetic number, because the mean of its divisors is an integer number (4850486550).

Almost surely, 2^121456605644 is an apocalyptic number.

It is an amenable number.

121456605644 is a deficient number, since it is larger than the sum of its proper divisors (111366748756).

121456605644 is a wasteful number, since it uses less digits than its factorization.

121456605644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11594 (or 11592 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 121456605644 in words is "one hundred twenty-one billion, four hundred fifty-six million, six hundred five thousand, six hundred forty-four".