1421133421221 has 12 divisors (see below), whose sum is σ = 2100486607648. Its totient is φ = 925389204264.

The previous prime is 1421133421163. The next prime is 1421133421243. The reversal of 1421133421221 is 1221243311241.

1421133421221 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 13 + 3 + 421 + 221 = 666.

It is not a de Polignac number, because 1421133421221 - 2¹⁷ = 1421133290149 is a prime.

It is a super-2 number, since 2×1421133421221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421133421621) 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 11 ways as a sum of consecutive naturals, for example, 1836089305 + ... + 1836090078.

Almost surely, 2^{1421133421221} is an apocalyptic number.

It is an amenable number.

1421133421221 is a deficient number, since it is larger than the sum of its proper divisors (679353186427).

1421133421221 is a wasteful number, since it uses less digits than its factorization.

1421133421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672179432 (or 3672179429 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 1421133421221 its reverse (1221243311241), we get a palindrome (2642376732462).

The spelling of 1421133421221 in words is "one trillion, four hundred twenty-one billion, one hundred thirty-three million, four hundred twenty-one thousand, two hundred twenty-one".