212201021129 has 2 divisors, whose sum is σ = 212201021130. Its totient is φ = 212201021128.

The previous prime is 212201021057. The next prime is 212201021141. The reversal of 212201021129 is 921120102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183522276025 + 28678745104 = 428395^2 + 169348^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201021129 - 2¹² = 212201017033 is a prime.

It is not a weakly prime, because it can be changed into another prime (212201021729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100510564 + 106100510565.

It is an arithmetic number, because the mean of its divisors is an integer number (106100510565).

Almost surely, 2^212201021129 is an apocalyptic number.

It is an amenable number.

212201021129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201021129 is an equidigital number, since it uses as much as digits as its factorization.

212201021129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 212201021129 in words is "two hundred twelve billion, two hundred one million, twenty-one thousand, one hundred twenty-nine".