241221401555121 has 32 divisors (see below), whose sum is σ = 385103112240000. Its totient is φ = 148348106973504.

The previous prime is 241221401555119. The next prime is 241221401555131. The reversal of 241221401555121 is 121555104122142.

241221401555121 is a `hidden beast` number, since 2 + 4 + 1 + 221 + 401 + 5 + 5 + 5 + 1 + 21 = 666.

It is not a de Polignac number, because 241221401555121 - 2¹ = 241221401555119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (241221401555131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221289891 + ... + 222377288.

It is an arithmetic number, because the mean of its divisors is an integer number (12034472257500).

Almost surely, 2^{241221401555121} is an apocalyptic number.

It is an amenable number.

241221401555121 is a deficient number, since it is larger than the sum of its proper divisors (143881710684879).

241221401555121 is a wasteful number, since it uses less digits than its factorization.

241221401555121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443668750 (or 443668744 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

Adding to 241221401555121 its reverse (121555104122142), we get a palindrome (362776505677263).

The spelling of 241221401555121 in words is "two hundred forty-one trillion, two hundred twenty-one billion, four hundred one million, five hundred fifty-five thousand, one hundred twenty-one".