1021420030221 has 24 divisors (see below), whose sum is σ = 1553252488320. Its totient is φ = 645017587776.

The previous prime is 1021420030201. The next prime is 1021420030249. The reversal of 1021420030221 is 1220300241201.

It is a happy number.

1021420030221 is a `hidden beast` number, since 1 + 0 + 21 + 420 + 0 + 3 + 0 + 221 = 666.

It is not a de Polignac number, because 1021420030221 - 2¹⁰ = 1021420029197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021420030194 and 1021420030203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021420030201) 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 23 ways as a sum of consecutive naturals, for example, 827121 + ... + 1651353.

It is an arithmetic number, because the mean of its divisors is an integer number (64718853680).

Almost surely, 2^{1021420030221} is an apocalyptic number.

It is an amenable number.

1021420030221 is a deficient number, since it is larger than the sum of its proper divisors (531832458099).

1021420030221 is a wasteful number, since it uses less digits than its factorization.

1021420030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831505 (or 831502 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1021420030221 its reverse (1220300241201), we get a palindrome (2241720271422).

The spelling of 1021420030221 in words is "one trillion, twenty-one billion, four hundred twenty million, thirty thousand, two hundred twenty-one".