121213333 has 2 divisors, whose sum is σ = 121213334. Its totient is φ = 121213332.

The previous prime is 121213321. The next prime is 121213397. The reversal of 121213333 is 333312121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70190884 + 51022449 = 8378^2 + 7143^2 .

It is an emirp because it is prime and its reverse (333312121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121213333 - 2¹³ = 121205141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121213333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121213303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606666 + 60606667.

It is an arithmetic number, because the mean of its divisors is an integer number (60606667).

Almost surely, 2^121213333 is an apocalyptic number.

It is an amenable number.

121213333 is a deficient number, since it is larger than the sum of its proper divisors (1).

121213333 is an equidigital number, since it uses as much as digits as its factorization.

121213333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 121213333 is about 11009.6926841761. The cubic root of 121213333 is about 494.8992523595.

Adding to 121213333 its reverse (333312121), we get a palindrome (454525454).

The spelling of 121213333 in words is "one hundred twenty-one million, two hundred thirteen thousand, three hundred thirty-three".