121128426 has 32 divisors (see below), whose sum is σ = 274259520. Its totient is φ = 39613392.

The previous prime is 121128379. The next prime is 121128433. The reversal of 121128426 is 624821121.

121128426 is a `hidden beast` number, since 1 + 211 + 28 + 426 = 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 self number, because there is not a number n which added to its sum of digits gives 121128426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18300 + ... + 24023.

It is an arithmetic number, because the mean of its divisors is an integer number (8570610).

Almost surely, 2^121128426 is an apocalyptic number.

121128426 is an abundant number, since it is smaller than the sum of its proper divisors (153131094).

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

121128426 is a wasteful number, since it uses less digits than its factorization.

121128426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42387 (or 42381 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 121128426 is about 11005.8359973243. The cubic root of 121128426 is about 494.7836703933.

Adding to 121128426 its reverse (624821121), we get a palindrome (745949547).

The spelling of 121128426 in words is "one hundred twenty-one million, one hundred twenty-eight thousand, four hundred twenty-six".