2121221999233 has 2 divisors, whose sum is σ = 2121221999234. Its totient is φ = 2121221999232.

The previous prime is 2121221999227. The next prime is 2121221999251. The reversal of 2121221999233 is 3329991221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1979682768144 + 141539231089 = 1407012^2 + 376217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121221999233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121221999933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060610999616 + 1060610999617.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610999617).

Almost surely, 2^{2121221999233} is an apocalyptic number.

It is an amenable number.

2121221999233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121221999233 is an equidigital number, since it uses as much as digits as its factorization.

2121221999233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 46.

The spelling of 2121221999233 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, nine hundred ninety-nine thousand, two hundred thirty-three".