121423128048 has 180 divisors, whose sum is σ = 367798778568. Its totient is φ = 37374105600.

The previous prime is 121423128041. The next prime is 121423128077. The reversal of 121423128048 is 840821324121.

It is a super-3 number, since 3×121423128048³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423128041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2178123 + ... + 2233173.

Almost surely, 2^121423128048 is an apocalyptic number.

121423128048 is a gapful number since it is divisible by the number (18) 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 121423128048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183899389284).

121423128048 is an abundant number, since it is smaller than the sum of its proper divisors (246375650520).

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

121423128048 is a wasteful number, since it uses less digits than its factorization.

121423128048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55152 (or 55126 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 121423128048 in words is "one hundred twenty-one billion, four hundred twenty-three million, one hundred twenty-eight thousand, forty-eight".