121755722712 has 128 divisors (see below), whose sum is σ = 349218293760. Its totient is φ = 35043010560.

The previous prime is 121755722687. The next prime is 121755722719. The reversal of 121755722712 is 217227557121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755722719) by changing a digit.

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, 794137 + ... + 934967.

It is an arithmetic number, because the mean of its divisors is an integer number (2728267920).

Almost surely, 2^121755722712 is an apocalyptic number.

121755722712 is a gapful number since it is divisible by the number (12) 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 121755722712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174609146880).

121755722712 is an abundant number, since it is smaller than the sum of its proper divisors (227462571048).

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

121755722712 is a wasteful number, since it uses less digits than its factorization.

121755722712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141033 (or 141029 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The spelling of 121755722712 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred twenty-two thousand, seven hundred twelve".