220220021121121 has 12 divisors (see below), whose sum is σ = 263097940293588. Its totient is φ = 183658395991392.

The previous prime is 220220021121119. The next prime is 220220021121167. The reversal of 220220021121121 is 121121120022022.

It can be written as a sum of positive squares in 2 ways, for example, as 162626128725025 + 57593892396096 = 12752495^2 + 7589064^2 .

It is not a de Polignac number, because 220220021121121 - 2¹ = 220220021121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220220025121121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60733594746 + ... + 60733598371.

It is an arithmetic number, because the mean of its divisors is an integer number (21924828357799).

Almost surely, 2^{220220021121121} is an apocalyptic number.

It is an amenable number.

220220021121121 is a deficient number, since it is larger than the sum of its proper divisors (42877919172467).

220220021121121 is a wasteful number, since it uses less digits than its factorization.

220220021121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121467193168 (or 121467193161 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220220021121121 its reverse (121121120022022), we get a palindrome (341341141143143).

The spelling of 220220021121121 in words is "two hundred twenty trillion, two hundred twenty billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".