240021121 has 4 divisors (see below), whose sum is σ = 240648192. Its totient is φ = 239394052.

The previous prime is 240021107. The next prime is 240021149. The reversal of 240021121 is 121120042.

It is a happy number.

240021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240021121 - 2⁹ = 240020609 is a prime.

It is a super-2 number, since 2×240021121² = 115220277052193282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240021101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312961 + ... + 313726.

It is an arithmetic number, because the mean of its divisors is an integer number (60162048).

Almost surely, 2^240021121 is an apocalyptic number.

It is an amenable number.

240021121 is a deficient number, since it is larger than the sum of its proper divisors (627071).

240021121 is an equidigital number, since it uses as much as digits as its factorization.

240021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627070.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 240021121 is about 15492.6150471765. The cubic root of 240021121 is about 621.4647306165.

Adding to 240021121 its reverse (121120042), we get a palindrome (361141163).

The spelling of 240021121 in words is "two hundred forty million, twenty-one thousand, one hundred twenty-one".