21003311231293 has 2 divisors, whose sum is σ = 21003311231294. Its totient is φ = 21003311231292.

The previous prime is 21003311231263. The next prime is 21003311231317. The reversal of 21003311231293 is 39213211330012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20146838721529 + 856472509764 = 4488523^2 + 925458^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003311231293 - 2⁴¹ = 18804287975741 is a prime.

It is a super-2 number, since 2×21003311231293² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003311231263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501655615646 + 10501655615647.

It is an arithmetic number, because the mean of its divisors is an integer number (10501655615647).

Almost surely, 2^{21003311231293} is an apocalyptic number.

It is an amenable number.

21003311231293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003311231293 is an equidigital number, since it uses as much as digits as its factorization.

21003311231293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 21003311231293 in words is "twenty-one trillion, three billion, three hundred eleven million, two hundred thirty-one thousand, two hundred ninety-three".