212323129 has 2 divisors, whose sum is σ = 212323130. Its totient is φ = 212323128.

The previous prime is 212323103. The next prime is 212323147. The reversal of 212323129 is 921323212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178275904 + 34047225 = 13352^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 212323129 - 2¹³ = 212314937 is a prime.

It is a super-2 number, since 2×212323129² = 90162222216701282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212323229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106161564 + 106161565.

It is an arithmetic number, because the mean of its divisors is an integer number (106161565).

Almost surely, 2^212323129 is an apocalyptic number.

It is an amenable number.

212323129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212323129 is an equidigital number, since it uses as much as digits as its factorization.

212323129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 212323129 is about 14571.3118489723. The cubic root of 212323129 is about 596.5759872113.

It can be divided in two parts, 2123 and 23129, that added together give a palindrome (25252).

The spelling of 212323129 in words is "two hundred twelve million, three hundred twenty-three thousand, one hundred twenty-nine".