241221021 has 8 divisors (see below), whose sum is σ = 321902400. Its totient is φ = 160676832.

The previous prime is 241220963. The next prime is 241221067. The reversal of 241221021 is 120122142.

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

It is not a de Polignac number, because 241221021 - 2¹⁴ = 241204637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241221221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30121 + ... + 37278.

It is an arithmetic number, because the mean of its divisors is an integer number (40237800).

Almost surely, 2^241221021 is an apocalyptic number.

It is an amenable number.

241221021 is a deficient number, since it is larger than the sum of its proper divisors (80681379).

241221021 is a wasteful number, since it uses less digits than its factorization.

241221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68595.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 241221021 is about 15531.2916719763. The cubic root of 241221021 is about 622.4986067935.

Adding to 241221021 its reverse (120122142), we get a palindrome (361343163).

The spelling of 241221021 in words is "two hundred forty-one million, two hundred twenty-one thousand, twenty-one".