21119395813357 has 2 divisors, whose sum is σ = 21119395813358. Its totient is φ = 21119395813356.

The previous prime is 21119395813333. The next prime is 21119395813361. The reversal of 21119395813357 is 75331859391112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15436459513476 + 5682936299881 = 3928926^2 + 2383891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21119395813357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21119395814357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10559697906678 + 10559697906679.

It is an arithmetic number, because the mean of its divisors is an integer number (10559697906679).

Almost surely, 2^{21119395813357} is an apocalyptic number.

It is an amenable number.

21119395813357 is a deficient number, since it is larger than the sum of its proper divisors (1).

21119395813357 is an equidigital number, since it uses as much as digits as its factorization.

21119395813357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 58.

The spelling of 21119395813357 in words is "twenty-one trillion, one hundred nineteen billion, three hundred ninety-five million, eight hundred thirteen thousand, three hundred fifty-seven".