240121001 has 4 divisors (see below), whose sum is σ = 240152004. Its totient is φ = 240090000.

The previous prime is 240120997. The next prime is 240121003. The reversal of 240121001 is 100121042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 153165376 + 86955625 = 12376^2 + 9325^2 .

It is a cyclic number.

It is not a de Polignac number, because 240121001 - 2² = 240120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7151 + ... + 23051.

It is an arithmetic number, because the mean of its divisors is an integer number (60038001).

Almost surely, 2^240121001 is an apocalyptic number.

It is an amenable number.

240121001 is a deficient number, since it is larger than the sum of its proper divisors (31003).

240121001 is a wasteful number, since it uses less digits than its factorization.

240121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31002.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 240121001 is about 15495.8381832026. The cubic root of 240121001 is about 621.5509220442.

Adding to 240121001 its reverse (100121042), we get a palindrome (340242043).

The spelling of 240121001 in words is "two hundred forty million, one hundred twenty-one thousand, one".