2121201233 has 2 divisors, whose sum is σ = 2121201234. Its totient is φ = 2121201232.

The previous prime is 2121201209. The next prime is 2121201239. The reversal of 2121201233 is 3321021212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1905933649 + 215267584 = 43657^2 + 14672^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121201233 - 2¹⁰ = 2121200209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121201239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600616 + 1060600617.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600617).

Almost surely, 2^2121201233 is an apocalyptic number.

It is an amenable number.

2121201233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121201233 is an equidigital number, since it uses as much as digits as its factorization.

2121201233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121201233 is about 46056.5004423914. The cubic root of 2121201233 is about 1284.8742442807.

Adding to 2121201233 its reverse (3321021212), we get a palindrome (5442222445).

The spelling of 2121201233 in words is "two billion, one hundred twenty-one million, two hundred one thousand, two hundred thirty-three".