12200012010121 has 4 divisors (see below), whose sum is σ = 13138474472452. Its totient is φ = 11261549547792.

The previous prime is 12200012010097. The next prime is 12200012010143. The reversal of 12200012010121 is 12101021000221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885696131721 + 5314315878400 = 2624061^2 + 2305280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200012010121 - 2¹³ = 12200012001929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 938462462317 = 12200012010121 / (1 + 2 + 2 + 0 + 0 + 0 + 1 + 2 + 0 + 1 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12200012010191) 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, 469231231146 + ... + 469231231171.

It is an arithmetic number, because the mean of its divisors is an integer number (3284618618113).

Almost surely, 2^{12200012010121} is an apocalyptic number.

It is an amenable number.

12200012010121 is a deficient number, since it is larger than the sum of its proper divisors (938462462331).

12200012010121 is an equidigital number, since it uses as much as digits as its factorization.

12200012010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938462462330.

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

Adding to 12200012010121 its reverse (12101021000221), we get a palindrome (24301033010342).

The spelling of 12200012010121 in words is "twelve trillion, two hundred billion, twelve million, ten thousand, one hundred twenty-one".