240102021 has 4 divisors (see below), whose sum is σ = 320136032. Its totient is φ = 160068012.

The previous prime is 240102019. The next prime is 240102059. The reversal of 240102021 is 120201042.

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 not a de Polignac number, because 240102021 - 2¹ = 240102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240101988 and 240102006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240102521) 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, 40017001 + ... + 40017006.

It is an arithmetic number, because the mean of its divisors is an integer number (80034008).

Almost surely, 2^240102021 is an apocalyptic number.

It is an amenable number.

240102021 is a deficient number, since it is larger than the sum of its proper divisors (80034011).

240102021 is an equidigital number, since it uses as much as digits as its factorization.

240102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80034010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 240102021 is about 15495.2257485975. The cubic root of 240102021 is about 621.5345450964.

Adding to 240102021 its reverse (120201042), we get a palindrome (360303063).

The spelling of 240102021 in words is "two hundred forty million, one hundred two thousand, twenty-one".