20112101222021 has 8 divisors (see below), whose sum is σ = 20122039572384. Its totient is φ = 20102165312400.

The previous prime is 20112101222011. The next prime is 20112101222027. The reversal of 20112101222021 is 12022210121102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112101222021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112101222027) 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, 15985490 + ... + 17197676.

It is an arithmetic number, because the mean of its divisors is an integer number (2515254946548).

Almost surely, 2^{20112101222021} is an apocalyptic number.

It is an amenable number.

20112101222021 is a deficient number, since it is larger than the sum of its proper divisors (9938350363).

20112101222021 is a wasteful number, since it uses less digits than its factorization.

20112101222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220371.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20112101222021 its reverse (12022210121102), we get a palindrome (32134311343123).

The spelling of 20112101222021 in words is "twenty trillion, one hundred twelve billion, one hundred one million, two hundred twenty-two thousand, twenty-one".