121327128 has 120 divisors (see below), whose sum is σ = 362009700. Its totient is φ = 36698688.

The previous prime is 121327127. The next prime is 121327133. The reversal of 121327128 is 821723121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121327127) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2056363 + ... + 2056421.

Almost surely, 2^121327128 is an apocalyptic number.

121327128 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 121327128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181004850).

121327128 is an abundant number, since it is smaller than the sum of its proper divisors (240682572).

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

121327128 is an equidigital number, since it uses as much as digits as its factorization.

121327128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 77 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 121327128 is about 11014.8594180770. The cubic root of 121327128 is about 495.0540742886.

The spelling of 121327128 in words is "one hundred twenty-one million, three hundred twenty-seven thousand, one hundred twenty-eight".