121755223000 has 32 divisors (see below), whose sum is σ = 284907224160. Its totient is φ = 48702088800.

The previous prime is 121755222923. The next prime is 121755223003. The reversal of 121755223000 is 322557121.

It is a self number, because there is not a number n which added to its sum of digits gives 121755223000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755223003) 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, 60876612 + ... + 60878611.

It is an arithmetic number, because the mean of its divisors is an integer number (8903350755).

Almost surely, 2^121755223000 is an apocalyptic number.

121755223000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121755223000 is an abundant number, since it is smaller than the sum of its proper divisors (163152001160).

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

121755223000 is a wasteful number, since it uses less digits than its factorization.

121755223000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121755244 (or 121755230 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 121755223000 in words is "one hundred twenty-one billion, seven hundred fifty-five million, two hundred twenty-three thousand".