121755742444 has 24 divisors (see below), whose sum is σ = 243520347168. Its totient is φ = 52179133440.

The previous prime is 121755742441. The next prime is 121755742457. The reversal of 121755742444 is 444247557121.

It is a junction number, because it is equal to n+sod(n) for n = 121755742394 and 121755742403.

It is not an unprimeable number, because it can be changed into a prime (121755742441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929574 + ... + 1052434.

It is an arithmetic number, because the mean of its divisors is an integer number (10146681132).

Almost surely, 2^121755742444 is an apocalyptic number.

121755742444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121755742444 is an abundant number, since it is smaller than the sum of its proper divisors (121764604724).

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

121755742444 is a wasteful number, since it uses less digits than its factorization.

121755742444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158265 (or 158263 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 46.

The spelling of 121755742444 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-two thousand, four hundred forty-four".