21021213003293 has 2 divisors, whose sum is σ = 21021213003294. Its totient is φ = 21021213003292.

The previous prime is 21021213003247. The next prime is 21021213003313. The reversal of 21021213003293 is 39230031212012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18590351592409 + 2430861410884 = 4311653^2 + 1559122^2 .

It is a cyclic number.

It is not a de Polignac number, because 21021213003293 - 2¹⁸ = 21021212741149 is a prime.

It is a super-2 number, since 2×21021213003293² (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 (21021213005293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510606501646 + 10510606501647.

It is an arithmetic number, because the mean of its divisors is an integer number (10510606501647).

Almost surely, 2^{21021213003293} is an apocalyptic number.

It is an amenable number.

21021213003293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021213003293 is an equidigital number, since it uses as much as digits as its factorization.

21021213003293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21021213003293 in words is "twenty-one trillion, twenty-one billion, two hundred thirteen million, three thousand, two hundred ninety-three".