121133421 has 16 divisors (see below), whose sum is σ = 179971200. Its totient is φ = 80524224.

The previous prime is 121133371. The next prime is 121133423. The reversal of 121133421 is 124331121.

121133421 is a `hidden beast` number, since 1 + 211 + 33 + 421 = 666.

It is not a de Polignac number, because 121133421 - 2⁷ = 121133293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121133394 and 121133403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3445 + ... + 15941.

It is an arithmetic number, because the mean of its divisors is an integer number (11248200).

Almost surely, 2^121133421 is an apocalyptic number.

It is an amenable number.

121133421 is a deficient number, since it is larger than the sum of its proper divisors (58837779).

121133421 is a wasteful number, since it uses less digits than its factorization.

121133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12865 (or 12859 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121133421 is about 11006.0629200455. The cubic root of 121133421 is about 494.7904714681.

Adding to 121133421 its reverse (124331121), we get a palindrome (245464542).

The spelling of 121133421 in words is "one hundred twenty-one million, one hundred thirty-three thousand, four hundred twenty-one".