212121323230031 has 4 divisors (see below), whose sum is σ = 218963946560064. Its totient is φ = 205278699900000.

The previous prime is 212121323230027. The next prime is 212121323230127. The reversal of 212121323230031 is 130032323121212.

212121323230031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212121323230031 - 2² = 212121323230027 is a prime.

It is a super-2 number, since 2×212121323230031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121323239031) 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, 3421311664970 + ... + 3421311665031.

It is an arithmetic number, because the mean of its divisors is an integer number (54740986640016).

Almost surely, 2^{212121323230031} is an apocalyptic number.

212121323230031 is a deficient number, since it is larger than the sum of its proper divisors (6842623330033).

212121323230031 is an equidigital number, since it uses as much as digits as its factorization.

212121323230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842623330032.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 212121323230031 its reverse (130032323121212), we get a palindrome (342153646351243).

The spelling of 212121323230031 in words is "two hundred twelve trillion, one hundred twenty-one billion, three hundred twenty-three million, two hundred thirty thousand, thirty-one".