121212010312321 has 4 divisors (see below), whose sum is σ = 121247154418500. Its totient is φ = 121176866206144.

The previous prime is 121212010312313. The next prime is 121212010312333. The reversal of 121212010312321 is 123213010212121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8358251052096 + 112853759260225 = 2891064^2 + 10623265^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212010312321 - 2³ = 121212010312313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212010312292 and 121212010312301.

It is not an unprimeable number, because it can be changed into a prime (121212010312301) 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, 17572047916 + ... + 17572054813.

It is an arithmetic number, because the mean of its divisors is an integer number (30311788604625).

Almost surely, 2^{121212010312321} is an apocalyptic number.

It is an amenable number.

121212010312321 is a deficient number, since it is larger than the sum of its proper divisors (35144106179).

121212010312321 is an equidigital number, since it uses as much as digits as its factorization.

121212010312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35144106178.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121212010312321 its reverse (123213010212121), we get a palindrome (244425020524442).

The spelling of 121212010312321 in words is "one hundred twenty-one trillion, two hundred twelve billion, ten million, three hundred twelve thousand, three hundred twenty-one".