2121211333 has 4 divisors (see below), whose sum is σ = 2122146828. Its totient is φ = 2120275840.

The previous prime is 2121211327. The next prime is 2121211349. The reversal of 2121211333 is 3331121212.

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 1487027844 + 634183489 = 38562^2 + 25183^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121211333 - 2¹⁷ = 2121080261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121211333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121211373) 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, 464338 + ... + 468883.

It is an arithmetic number, because the mean of its divisors is an integer number (530536707).

Almost surely, 2^2121211333 is an apocalyptic number.

It is an amenable number.

2121211333 is a deficient number, since it is larger than the sum of its proper divisors (935495).

2121211333 is an equidigital number, since it uses as much as digits as its factorization.

2121211333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935494.

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

The square root of 2121211333 is about 46056.6100901923. The cubic root of 2121211333 is about 1284.8762835669.

Adding to 2121211333 its reverse (3331121212), we get a palindrome (5452332545).

The spelling of 2121211333 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, three hundred thirty-three".