221120102011 has 4 divisors (see below), whose sum is σ = 221360712400. Its totient is φ = 220879491624.

The previous prime is 221120101999. The next prime is 221120102129. The reversal of 221120102011 is 110201021122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110201021122 = 2 ⋅55100510561.

It is a cyclic number.

It is not a de Polignac number, because 221120102011 - 2¹⁵ = 221120069243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120101982 and 221120102000.

It is not an unprimeable number, because it can be changed into a prime (221120102311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120303816 + ... + 120305653.

It is an arithmetic number, because the mean of its divisors is an integer number (55340178100).

Almost surely, 2^221120102011 is an apocalyptic number.

221120102011 is a deficient number, since it is larger than the sum of its proper divisors (240610389).

221120102011 is an equidigital number, since it uses as much as digits as its factorization.

221120102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240610388.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221120102011 its reverse (110201021122), we get a palindrome (331321123133).

The spelling of 221120102011 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, eleven".