220101021121 has 16 divisors (see below), whose sum is σ = 225331234128. Its totient is φ = 214927257600.

The previous prime is 220101021061. The next prime is 220101021143. The reversal of 220101021121 is 121120101022.

220101021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 112080996225 + 108020024896 = 334785^2 + 328664^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101021121 - 2⁹ = 220101020609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220101025121) 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 15 ways as a sum of consecutive naturals, for example, 6530505 + ... + 6564121.

It is an arithmetic number, because the mean of its divisors is an integer number (14083202133).

Almost surely, 2^220101021121 is an apocalyptic number.

It is an amenable number.

220101021121 is a deficient number, since it is larger than the sum of its proper divisors (5230213007).

220101021121 is a wasteful number, since it uses less digits than its factorization.

220101021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34452.

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

Adding to 220101021121 its reverse (121120101022), we get a palindrome (341221122143).

The spelling of 220101021121 in words is "two hundred twenty billion, one hundred one million, twenty-one thousand, one hundred twenty-one".