20201101221 has 8 divisors (see below), whose sum is σ = 30782630464. Its totient is φ = 11543486400.

The previous prime is 20201101187. The next prime is 20201101229. The reversal of 20201101221 is 12210110202.

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

It is not a de Polignac number, because 20201101221 - 2¹⁴ = 20201084837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201101197 and 20201101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480978580 + ... + 480978621.

It is an arithmetic number, because the mean of its divisors is an integer number (3847828808).

Almost surely, 2^20201101221 is an apocalyptic number.

20201101221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20201101221 is a deficient number, since it is larger than the sum of its proper divisors (10581529243).

20201101221 is an equidigital number, since it uses as much as digits as its factorization.

20201101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961957211.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20201101221 its reverse (12210110202), we get a palindrome (32411211423).

The spelling of 20201101221 in words is "twenty billion, two hundred one million, one hundred one thousand, two hundred twenty-one".