2124221389 has 2 divisors, whose sum is σ = 2124221390. Its totient is φ = 2124221388.

The previous prime is 2124221329. The next prime is 2124221423. The reversal of 2124221389 is 9831224212.

It is a happy number.

It is an a-pointer prime, because the next prime (2124221423) can be obtained adding 2124221389 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197506025 + 926715364 = 34605^2 + 30442^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124221389 - 2¹¹ = 2124219341 is a prime.

It is a super-4 number, since 4×2124221389⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124221329) 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, 1062110694 + 1062110695.

It is an arithmetic number, because the mean of its divisors is an integer number (1062110695).

Almost surely, 2^2124221389 is an apocalyptic number.

It is an amenable number.

2124221389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124221389 is an equidigital number, since it uses as much as digits as its factorization.

2124221389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 2124221389 is about 46089.2762906948. The cubic root of 2124221389 is about 1285.4837543332.

The spelling of 2124221389 in words is "two billion, one hundred twenty-four million, two hundred twenty-one thousand, three hundred eighty-nine".