121755443370 has 128 divisors (see below), whose sum is σ = 337498306560. Its totient is φ = 27801089280.

The previous prime is 121755443363. The next prime is 121755443437. The reversal of 121755443370 is 73344557121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1028587 + ... + 1140833.

It is an arithmetic number, because the mean of its divisors is an integer number (2636705520).

Almost surely, 2^121755443370 is an apocalyptic number.

121755443370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121755443370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168749153280).

121755443370 is an abundant number, since it is smaller than the sum of its proper divisors (215742863190).

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

121755443370 is a wasteful number, since it uses less digits than its factorization.

121755443370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112460.

The product of its (nonzero) digits is 352800, while the sum is 42.

It can be divided in two parts, 12175 and 5443370, that added together give a palindrome (5455545).

The spelling of 121755443370 in words is "one hundred twenty-one billion, seven hundred fifty-five million, four hundred forty-three thousand, three hundred seventy".