220101231121 has 4 divisors (see below), whose sum is σ = 220300780032. Its totient is φ = 219901682212.

The previous prime is 220101231037. The next prime is 220101231143. The reversal of 220101231121 is 121132101022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220101231121 - 2¹⁵ = 220101198353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220101231095 and 220101231104.

It is not an unprimeable number, because it can be changed into a prime (220101231221) 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 3 ways as a sum of consecutive naturals, for example, 99772801 + ... + 99775006.

It is an arithmetic number, because the mean of its divisors is an integer number (55075195008).

Almost surely, 2^220101231121 is an apocalyptic number.

It is an amenable number.

220101231121 is a deficient number, since it is larger than the sum of its proper divisors (199548911).

220101231121 is a wasteful number, since it uses less digits than its factorization.

220101231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199548910.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 220101231121 its reverse (121132101022), we get a palindrome (341233332143).

The spelling of 220101231121 in words is "two hundred twenty billion, one hundred one million, two hundred thirty-one thousand, one hundred twenty-one".