121153428 has 144 divisors (see below), whose sum is σ = 352737280. Its totient is φ = 35925120.

The previous prime is 121153427. The next prime is 121153453. The reversal of 121153428 is 824351121.

121153428 is a `hidden beast` number, since 121 + 1 + 534 + 2 + 8 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121153421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 953901 + ... + 954027.

Almost surely, 2^121153428 is an apocalyptic number.

121153428 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 121153428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176368640).

121153428 is an abundant number, since it is smaller than the sum of its proper divisors (231583852).

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

121153428 is a wasteful number, since it uses less digits than its factorization.

121153428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 216 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 121153428 is about 11006.9717906425. The cubic root of 121153428 is about 494.8177106559.

The spelling of 121153428 in words is "one hundred twenty-one million, one hundred fifty-three thousand, four hundred twenty-eight".