220011211121 has 4 divisors (see below), whose sum is σ = 236935150452. Its totient is φ = 203087271792.

The previous prime is 220011211109. The next prime is 220011211139. The reversal of 220011211121 is 121112110022.

220011211121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16216749025 + 203794462096 = 127345^2 + 451436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220011211121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220011211096 and 220011211105.

It is not an unprimeable number, because it can be changed into a prime (220011214121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8461969646 + ... + 8461969671.

It is an arithmetic number, because the mean of its divisors is an integer number (59233787613).

Almost surely, 2^220011211121 is an apocalyptic number.

It is an amenable number.

220011211121 is a deficient number, since it is larger than the sum of its proper divisors (16923939331).

220011211121 is a wasteful number, since it uses less digits than its factorization.

220011211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16923939330.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 220011211121 its reverse (121112110022), we get a palindrome (341123321143).

The spelling of 220011211121 in words is "two hundred twenty billion, eleven million, two hundred eleven thousand, one hundred twenty-one".