2021121233 has 2 divisors, whose sum is σ = 2021121234. Its totient is φ = 2021121232.

The previous prime is 2021121209. The next prime is 2021121269. The reversal of 2021121233 is 3321211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2011343104 + 9778129 = 44848^2 + 3127^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021121233 - 2¹⁴ = 2021104849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021121293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560616 + 1010560617.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560617).

Almost surely, 2^2021121233 is an apocalyptic number.

It is an amenable number.

2021121233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021121233 is an equidigital number, since it uses as much as digits as its factorization.

2021121233 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2021121233 is about 44956.8819314685. The cubic root of 2021121233 is about 1264.3407091159.

Adding to 2021121233 its reverse (3321211202), we get a palindrome (5342332435).

The spelling of 2021121233 in words is "two billion, twenty-one million, one hundred twenty-one thousand, two hundred thirty-three".