212321129 has 2 divisors, whose sum is σ = 212321130. Its totient is φ = 212321128.

The previous prime is 212321113. The next prime is 212321167. The reversal of 212321129 is 921123212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181629529 + 30691600 = 13477^2 + 5540^2 .

It is a cyclic number.

It is not a de Polignac number, because 212321129 - 2⁴ = 212321113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212321189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160564 + 106160565.

It is an arithmetic number, because the mean of its divisors is an integer number (106160565).

Almost surely, 2^212321129 is an apocalyptic number.

It is an amenable number.

212321129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212321129 is an equidigital number, since it uses as much as digits as its factorization.

212321129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 212321129 is about 14571.2432208100. The cubic root of 212321129 is about 596.5741140354.

The spelling of 212321129 in words is "two hundred twelve million, three hundred twenty-one thousand, one hundred twenty-nine".