120400921 has 8 divisors (see below), whose sum is σ = 121581504. Its totient is φ = 119224560.

The previous prime is 120400909. The next prime is 120400933. The reversal of 120400921 is 129004021.

It is an interprime number because it is at equal distance from previous prime (120400909) and next prime (120400933).

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

It is a cyclic number.

It is not a de Polignac number, because 120400921 - 2¹³ = 120392729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120400901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96715 + ... + 97951.

It is an arithmetic number, because the mean of its divisors is an integer number (15197688).

Almost surely, 2^120400921 is an apocalyptic number.

It is an amenable number.

120400921 is a deficient number, since it is larger than the sum of its proper divisors (1180583).

120400921 is a wasteful number, since it uses less digits than its factorization.

120400921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 120400921 is about 10972.7353472140. The cubic root of 120400921 is about 493.7911132565.

Adding to 120400921 its reverse (129004021), we get a palindrome (249404942).

The spelling of 120400921 in words is "one hundred twenty million, four hundred thousand, nine hundred twenty-one".