20012101110221 has 4 divisors (see below), whose sum is σ = 21831383029344. Its totient is φ = 18192819191100.

The previous prime is 20012101110173. The next prime is 20012101110251. The reversal of 20012101110221 is 12201110121002.

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 a de Polignac number, because none of the positive numbers 2^k-20012101110221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012101110196 and 20012101110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012101110251) 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 3 ways as a sum of consecutive naturals, for example, 909640959545 + ... + 909640959566.

It is an arithmetic number, because the mean of its divisors is an integer number (5457845757336).

Almost surely, 2^{20012101110221} is an apocalyptic number.

It is an amenable number.

20012101110221 is a deficient number, since it is larger than the sum of its proper divisors (1819281919123).

20012101110221 is a wasteful number, since it uses less digits than its factorization.

20012101110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819281919122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20012101110221 its reverse (12201110121002), we get a palindrome (32213211231223).

The spelling of 20012101110221 in words is "twenty trillion, twelve billion, one hundred one million, one hundred ten thousand, two hundred twenty-one".