212210109929 has 2 divisors, whose sum is σ = 212210109930. Its totient is φ = 212210109928.

The previous prime is 212210109883. The next prime is 212210109953. The reversal of 212210109929 is 929901012212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212207635600 + 2474329 = 460660^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210109929 - 2⁸ = 212210109673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212210109892 and 212210109901.

It is not a weakly prime, because it can be changed into another prime (212210100929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105054964 + 106105054965.

It is an arithmetic number, because the mean of its divisors is an integer number (106105054965).

Almost surely, 2^212210109929 is an apocalyptic number.

It is an amenable number.

212210109929 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210109929 is an equidigital number, since it uses as much as digits as its factorization.

212210109929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 212210109929 in words is "two hundred twelve billion, two hundred ten million, one hundred nine thousand, nine hundred twenty-nine".