12200121212021 has 2 divisors, whose sum is σ = 12200121212022. Its totient is φ = 12200121212020.

The previous prime is 12200121211981. The next prime is 12200121212033. The reversal of 12200121212021 is 12021212100221.

12200121212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9648789062500 + 2551332149521 = 3106250^2 + 1597289^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200121212021 - 2²² = 12200117017717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12200111212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100060606010 + 6100060606011.

It is an arithmetic number, because the mean of its divisors is an integer number (6100060606011).

Almost surely, 2^{12200121212021} is an apocalyptic number.

It is an amenable number.

12200121212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200121212021 is an equidigital number, since it uses as much as digits as its factorization.

12200121212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12200121212021 its reverse (12021212100221), we get a palindrome (24221333312242).

The spelling of 12200121212021 in words is "twelve trillion, two hundred billion, one hundred twenty-one million, two hundred twelve thousand, twenty-one".