121755742446 has 32 divisors (see below), whose sum is σ = 262946265120. Its totient is φ = 37362858624.

The previous prime is 121755742441. The next prime is 121755742457. The reversal of 121755742446 is 644247557121.

It is a junction number, because it is equal to n+sod(n) for n = 121755742395 and 121755742404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755742441) 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 15 ways as a sum of consecutive naturals, for example, 2063361 + ... + 2121548.

It is an arithmetic number, because the mean of its divisors is an integer number (8217070785).

Almost surely, 2^121755742446 is an apocalyptic number.

121755742446 is an abundant number, since it is smaller than the sum of its proper divisors (141190522674).

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

121755742446 is a wasteful number, since it uses less digits than its factorization.

121755742446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185300.

The product of its digits is 1881600, while the sum is 48.

The spelling of 121755742446 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-two thousand, four hundred forty-six".