221020021002021 has 8 divisors (see below), whose sum is σ = 294693496553664. Its totient is φ = 147346613059200.

The previous prime is 221020021001981. The next prime is 221020021002043. The reversal of 221020021002021 is 120200120020122.

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

It is not a de Polignac number, because 221020021002021 - 2¹³ = 221020020993829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020021002091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8706601 + ... + 22756206.

It is an arithmetic number, because the mean of its divisors is an integer number (36836687069208).

Almost surely, 2^{221020021002021} is an apocalyptic number.

It is an amenable number.

221020021002021 is a deficient number, since it is larger than the sum of its proper divisors (73673475551643).

221020021002021 is a wasteful number, since it uses less digits than its factorization.

221020021002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33804411.

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

Adding to 221020021002021 its reverse (120200120020122), we get a palindrome (341220141022143).

The spelling of 221020021002021 in words is "two hundred twenty-one trillion, twenty billion, twenty-one million, two thousand, twenty-one".