1221410041221 has 8 divisors (see below), whose sum is σ = 1629094881184. Its totient is φ = 813999281040.

The previous prime is 1221410041219. The next prime is 1221410041253. The reversal of 1221410041221 is 1221400141221.

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

It is not a de Polignac number, because 1221410041221 - 2¹ = 1221410041219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221410045221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68509546 + ... + 68527371.

It is an arithmetic number, because the mean of its divisors is an integer number (203636860148).

Almost surely, 2^{1221410041221} is an apocalyptic number.

It is an amenable number.

1221410041221 is a deficient number, since it is larger than the sum of its proper divisors (407684839963).

1221410041221 is a wasteful number, since it uses less digits than its factorization.

1221410041221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137039891.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 1221410041221 its reverse (1221400141221), we get a palindrome (2442810182442).

The spelling of 1221410041221 in words is "one trillion, two hundred twenty-one billion, four hundred ten million, forty-one thousand, two hundred twenty-one".