921360268781 has 2 divisors, whose sum is σ = 921360268782. Its totient is φ = 921360268780.

The previous prime is 921360268729. The next prime is 921360268789. The reversal of 921360268781 is 187862063129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670910066281 + 250450202500 = 819091^2 + 500450^2 .

It is a cyclic number.

It is not a de Polignac number, because 921360268781 - 2¹⁰ = 921360267757 is a prime.

It is a super-2 number, since 2×921360268781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921360268789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460680134390 + 460680134391.

It is an arithmetic number, because the mean of its divisors is an integer number (460680134391).

Almost surely, 2^921360268781 is an apocalyptic number.

It is an amenable number.

921360268781 is a deficient number, since it is larger than the sum of its proper divisors (1).

921360268781 is an equidigital number, since it uses as much as digits as its factorization.

921360268781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 921360268781 in words is "nine hundred twenty-one billion, three hundred sixty million, two hundred sixty-eight thousand, seven hundred eighty-one".