21301143389 has 2 divisors, whose sum is σ = 21301143390. Its totient is φ = 21301143388.

The previous prime is 21301143373. The next prime is 21301143431. The reversal of 21301143389 is 98334110312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20532024100 + 769119289 = 143290^2 + 27733^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301143389 - 2⁴ = 21301143373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301143319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650571694 + 10650571695.

It is an arithmetic number, because the mean of its divisors is an integer number (10650571695).

Almost surely, 2^21301143389 is an apocalyptic number.

It is an amenable number.

21301143389 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301143389 is an equidigital number, since it uses as much as digits as its factorization.

21301143389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 21301143389 in words is "twenty-one billion, three hundred one million, one hundred forty-three thousand, three hundred eighty-nine".