220111122121121 has 16 divisors (see below), whose sum is σ = 276241635345408. Its totient is φ = 170379298098000.

The previous prime is 220111122121117. The next prime is 220111122121159. The reversal of 220111122121121 is 121121221111022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220111122121121 - 2² = 220111122121117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220111122121093 and 220111122121102.

It is not an unprimeable number, because it can be changed into a prime (220111122121921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9465504935 + ... + 9465528188.

It is an arithmetic number, because the mean of its divisors is an integer number (17265102209088).

Almost surely, 2^{220111122121121} is an apocalyptic number.

It is an amenable number.

220111122121121 is a deficient number, since it is larger than the sum of its proper divisors (56130513224287).

220111122121121 is a wasteful number, since it uses less digits than its factorization.

220111122121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931033292.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 220111122121121 its reverse (121121221111022), we get a palindrome (341232343232143).

The spelling of 220111122121121 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".