20211120112221 has 24 divisors (see below), whose sum is σ = 29635649419896. Its totient is φ = 13271550566400.

The previous prime is 20211120112163. The next prime is 20211120112243. The reversal of 20211120112221 is 12221102111202.

20211120112221 is a `hidden beast` number, since 2 + 0 + 211 + 120 + 112 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11893600664100 + 8317519448121 = 3448710^2 + 2884011^2 .

It is not a de Polignac number, because 20211120112221 - 2¹⁵ = 20211120079453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20211120112194 and 20211120112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211120112291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57426780 + ... + 57777653.

It is an arithmetic number, because the mean of its divisors is an integer number (1234818725829).

Almost surely, 2^{20211120112221} is an apocalyptic number.

It is an amenable number.

20211120112221 is a deficient number, since it is larger than the sum of its proper divisors (9424529307675).

20211120112221 is a wasteful number, since it uses less digits than its factorization.

20211120112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115204733 (or 115204730 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20211120112221 its reverse (12221102111202), we get a palindrome (32432222223423).

The spelling of 20211120112221 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-one".