121234428 has 144 divisors (see below), whose sum is σ = 377932800. Its totient is φ = 33475680.

The previous prime is 121234411. The next prime is 121234433. The reversal of 121234428 is 824432121.

121234428 is a `hidden beast` number, since 1 + 2 + 1 + 234 + 428 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163683 + ... + 164421.

Almost surely, 2^121234428 is an apocalyptic number.

121234428 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 121234428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188966400).

121234428 is an abundant number, since it is smaller than the sum of its proper divisors (256698372).

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

121234428 is a wasteful number, since it uses less digits than its factorization.

121234428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 782 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 121234428 is about 11010.6506619727. The cubic root of 121234428 is about 494.9279601314.

Adding to 121234428 its reverse (824432121), we get a palindrome (945666549).

The spelling of 121234428 in words is "one hundred twenty-one million, two hundred thirty-four thousand, four hundred twenty-eight".