220121002212112 has 20 divisors (see below), whose sum is σ = 426628087698780. Its totient is φ = 110023431193088.

The previous prime is 220121002212109. The next prime is 220121002212113. The reversal of 220121002212112 is 211212200121022.

It can be written as a sum of positive squares in 2 ways, for example, as 809071466256 + 219311930745856 = 899484^2 + 14809184^2 .

It is a super-2 number, since 2×220121002212112² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220121002212112.

It is not an unprimeable number, because it can be changed into a prime (220121002212113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316820573 + ... + 2316915580.

It is an arithmetic number, because the mean of its divisors is an integer number (21331404384939).

Almost surely, 2^{220121002212112} is an apocalyptic number.

It is an amenable number.

220121002212112 is a deficient number, since it is larger than the sum of its proper divisors (206507085486668).

220121002212112 is a wasteful number, since it uses less digits than its factorization.

220121002212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633739130 (or 4633739124 counting only the distinct ones).

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

Adding to 220121002212112 its reverse (211212200121022), we get a palindrome (431333202333134).

The spelling of 220121002212112 in words is "two hundred twenty trillion, one hundred twenty-one billion, two million, two hundred twelve thousand, one hundred twelve".