21302001293 has 2 divisors, whose sum is σ = 21302001294. Its totient is φ = 21302001292.

The previous prime is 21302001289. The next prime is 21302001311. The reversal of 21302001293 is 39210020312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18944219044 + 2357782249 = 137638^2 + 48557^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302001293 - 2² = 21302001289 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302001223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651000646 + 10651000647.

It is an arithmetic number, because the mean of its divisors is an integer number (10651000647).

Almost surely, 2^21302001293 is an apocalyptic number.

It is an amenable number.

21302001293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302001293 is an equidigital number, since it uses as much as digits as its factorization.

21302001293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 21302001293 in words is "twenty-one billion, three hundred two million, one thousand, two hundred ninety-three".