121044721 has 8 divisors (see below), whose sum is σ = 138476864. Its totient is φ = 103647600.

The previous prime is 121044701. The next prime is 121044733. The reversal of 121044721 is 127440121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121044721 - 2¹⁵ = 121011953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121044692 and 121044701.

It is not an unprimeable number, because it can be changed into a prime (121044701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870 + ... + 15583.

It is an arithmetic number, because the mean of its divisors is an integer number (17309608).

Almost surely, 2^121044721 is an apocalyptic number.

It is an amenable number.

121044721 is a deficient number, since it is larger than the sum of its proper divisors (17432143).

121044721 is a wasteful number, since it uses less digits than its factorization.

121044721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17511.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 121044721 is about 11002.0325849363. The cubic root of 121044721 is about 494.6696717991.

Adding to 121044721 its reverse (127440121), we get a palindrome (248484842).

The spelling of 121044721 in words is "one hundred twenty-one million, forty-four thousand, seven hundred twenty-one".