21120221011101 has 8 divisors (see below), whose sum is σ = 29068691284224. Its totient is φ = 13625949039360.

The previous prime is 21120221011091. The next prime is 21120221011103. The reversal of 21120221011101 is 10111012202112.

It is a happy number.

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

It is not a de Polignac number, because 21120221011101 - 2¹⁷ = 21120220880029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120221011103) 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, 113549575236 + ... + 113549575421.

It is an arithmetic number, because the mean of its divisors is an integer number (3633586410528).

Almost surely, 2^{21120221011101} is an apocalyptic number.

It is an amenable number.

21120221011101 is a deficient number, since it is larger than the sum of its proper divisors (7948470273123).

21120221011101 is a wasteful number, since it uses less digits than its factorization.

21120221011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227099150691.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120221011101 its reverse (10111012202112), we get a palindrome (31231233213213).

The spelling of 21120221011101 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, eleven thousand, one hundred one".