2121322873 has 2 divisors, whose sum is σ = 2121322874. Its totient is φ = 2121322872.

The previous prime is 2121322831. The next prime is 2121322891. The reversal of 2121322873 is 3782231212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2049191824 + 72131049 = 45268^2 + 8493^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121322873 - 2¹³ = 2121314681 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121322573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060661436 + 1060661437.

It is an arithmetic number, because the mean of its divisors is an integer number (1060661437).

Almost surely, 2^2121322873 is an apocalyptic number.

It is an amenable number.

2121322873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121322873 is an equidigital number, since it uses as much as digits as its factorization.

2121322873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 2121322873 is about 46057.8209753783. The cubic root of 2121322873 is about 1284.8988041249.

The spelling of 2121322873 in words is "two billion, one hundred twenty-one million, three hundred twenty-two thousand, eight hundred seventy-three".