12200220212121 has 12 divisors (see below), whose sum is σ = 17647395802660. Its totient is φ = 8122008373920.

The previous prime is 12200220212113. The next prime is 12200220212171. The reversal of 12200220212121 is 12121202200221.

It is a happy number.

12200220212121 is a `hidden beast` number, since 1 + 220 + 0 + 220 + 212 + 12 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5894873220096 + 6305346992025 = 2427936^2 + 2511045^2 .

It is not a de Polignac number, because 12200220212121 - 2³ = 12200220212113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200220212094 and 12200220212103.

It is not an unprimeable number, because it can be changed into a prime (12200220212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955973890 + ... + 955986651.

Almost surely, 2^{12200220212121} is an apocalyptic number.

It is an amenable number.

12200220212121 is a deficient number, since it is larger than the sum of its proper divisors (5447175590539).

12200220212121 is a wasteful number, since it uses less digits than its factorization.

12200220212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911961256 (or 1911961253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12200220212121 its reverse (12121202200221), we get a palindrome (24321422412342).

The spelling of 12200220212121 in words is "twelve trillion, two hundred billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".