221021002020201 has 16 divisors (see below), whose sum is σ = 325596156430464. Its totient is φ = 132650285951744.

The previous prime is 221021002020187. The next prime is 221021002020223. The reversal of 221021002020201 is 102020200120122.

It is a cyclic number.

It is not a de Polignac number, because 221021002020201 - 2¹⁵ = 221021001987433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021002020281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94211849646 + ... + 94211851991.

It is an arithmetic number, because the mean of its divisors is an integer number (20349759776904).

Almost surely, 2^{221021002020201} is an apocalyptic number.

It is an amenable number.

221021002020201 is a deficient number, since it is larger than the sum of its proper divisors (104575154410263).

221021002020201 is a wasteful number, since it uses less digits than its factorization.

221021002020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188423701680.

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

Adding to 221021002020201 its reverse (102020200120122), we get a palindrome (323041202140323).

The spelling of 221021002020201 in words is "two hundred twenty-one trillion, twenty-one billion, two million, twenty thousand, two hundred one".