20011101103221 has 4 divisors (see below), whose sum is σ = 26681468137632. Its totient is φ = 13340734068812.

The previous prime is 20011101103157. The next prime is 20011101103243. The reversal of 20011101103221 is 12230110111002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20011101103221 - 2⁶ = 20011101103157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011101103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011101101221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335183517201 + ... + 3335183517206.

It is an arithmetic number, because the mean of its divisors is an integer number (6670367034408).

Almost surely, 2^{20011101103221} is an apocalyptic number.

It is an amenable number.

20011101103221 is a deficient number, since it is larger than the sum of its proper divisors (6670367034411).

20011101103221 is an equidigital number, since it uses as much as digits as its factorization.

20011101103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670367034410.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20011101103221 its reverse (12230110111002), we get a palindrome (32241211214223).

The spelling of 20011101103221 in words is "twenty trillion, eleven billion, one hundred one million, one hundred three thousand, two hundred twenty-one".