121221709296 has 160 divisors (see below), whose sum is σ = 328661630976. Its totient is φ = 38465280000.

The previous prime is 121221709261. The next prime is 121221709303. The reversal of 121221709296 is 692907122121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15242121 + ... + 15250071.

Almost surely, 2^121221709296 is an apocalyptic number.

121221709296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121221709296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164330815488).

121221709296 is an abundant number, since it is smaller than the sum of its proper divisors (207439921680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221709296 is a wasteful number, since it uses less digits than its factorization.

121221709296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8191 (or 8185 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 121221709296 in words is "one hundred twenty-one billion, two hundred twenty-one million, seven hundred nine thousand, two hundred ninety-six".