20211020221201 has 16 divisors (see below), whose sum is σ = 21485985791040. Its totient is φ = 18957187771200.

The previous prime is 20211020221159. The next prime is 20211020221291. The reversal of 20211020221201 is 10212202011202.

It is a happy number.

It is not a de Polignac number, because 20211020221201 - 2¹¹ = 20211020219153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211020221291) 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, 82573266 + ... + 82817668.

It is an arithmetic number, because the mean of its divisors is an integer number (1342874111940).

Almost surely, 2^{20211020221201} is an apocalyptic number.

It is an amenable number.

20211020221201 is a deficient number, since it is larger than the sum of its proper divisors (1274965569839).

20211020221201 is a wasteful number, since it uses less digits than its factorization.

20211020221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287616.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211020221201 its reverse (10212202011202), we get a palindrome (30423222232403).

The spelling of 20211020221201 in words is "twenty trillion, two hundred eleven billion, twenty million, two hundred twenty-one thousand, two hundred one".