121602848656 has 15 divisors (see below), whose sum is σ = 235608221851. Its totient is φ = 60800726896.

The previous prime is 121602848641. The next prime is 121602848659. The reversal of 121602848656 is 656848206121.

The square root of 121602848656 is 348716.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121602848659) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1351275 + ... + 1438453.

Almost surely, 2^121602848656 is an apocalyptic number.

121602848656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

121602848656 is the 348716-th square number.

It is an amenable number.

121602848656 is a deficient number, since it is larger than the sum of its proper divisors (114005373195).

121602848656 is an frugal number, since it uses more digits than its factorization.

121602848656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174366 (or 87181 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

Multiplying 121602848656 by its sum of digits (49), we get a square (5958539584144 = 2441012²).

The spelling of 121602848656 in words is "one hundred twenty-one billion, six hundred two million, eight hundred forty-eight thousand, six hundred fifty-six".