20011120221 has 8 divisors (see below), whose sum is σ = 26696136960. Its totient is φ = 13333425152.

The previous prime is 20011120193. The next prime is 20011120229. The reversal of 20011120221 is 12202111002.

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

It is a cyclic number.

It is not a de Polignac number, because 20011120221 - 2¹⁹ = 20010595933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011120197 and 20011120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011120229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1824036 + ... + 1834973.

It is an arithmetic number, because the mean of its divisors is an integer number (3337017120).

Almost surely, 2^20011120221 is an apocalyptic number.

It is an amenable number.

20011120221 is a deficient number, since it is larger than the sum of its proper divisors (6685016739).

20011120221 is a wasteful number, since it uses less digits than its factorization.

20011120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660835.

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

Adding to 20011120221 its reverse (12202111002), we get a palindrome (32213231223).

The spelling of 20011120221 in words is "twenty billion, eleven million, one hundred twenty thousand, two hundred twenty-one".