212123030113 has 4 divisors (see below), whose sum is σ = 214808131840. Its totient is φ = 209437928388.

The previous prime is 212123030111. The next prime is 212123030123. The reversal of 212123030113 is 311030321212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212123030113 - 2¹ = 212123030111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212123030111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342550745 + ... + 1342550902.

It is an arithmetic number, because the mean of its divisors is an integer number (53702032960).

Almost surely, 2^212123030113 is an apocalyptic number.

It is an amenable number.

212123030113 is a deficient number, since it is larger than the sum of its proper divisors (2685101727).

212123030113 is an equidigital number, since it uses as much as digits as its factorization.

212123030113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685101726.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212123030113 its reverse (311030321212), we get a palindrome (523153351325).

The spelling of 212123030113 in words is "two hundred twelve billion, one hundred twenty-three million, thirty thousand, one hundred thirteen".