212121323313 has 16 divisors (see below), whose sum is σ = 295731373056. Its totient is φ = 134987996880.

The previous prime is 212121323303. The next prime is 212121323371. The reversal of 212121323313 is 313323121212.

It is not a de Polignac number, because 212121323313 - 2²⁵ = 212087768881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212121323303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3122683 + ... + 3189888.

It is an arithmetic number, because the mean of its divisors is an integer number (18483210816).

Almost surely, 2^212121323313 is an apocalyptic number.

212121323313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

212121323313 is a deficient number, since it is larger than the sum of its proper divisors (83610049743).

212121323313 is a wasteful number, since it uses less digits than its factorization.

212121323313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313084.

The product of its digits is 1296, while the sum is 24.

Adding to 212121323313 its reverse (313323121212), we get a palindrome (525444444525).

The spelling of 212121323313 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred thirteen".