21355462562701 has 2 divisors, whose sum is σ = 21355462562702. Its totient is φ = 21355462562700.

The previous prime is 21355462562699. The next prime is 21355462562719. The reversal of 21355462562701 is 10726526455312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14247378684900 + 7108083877801 = 3774570^2 + 2666099^2 .

It is a cyclic number.

It is not a de Polignac number, because 21355462562701 - 2¹ = 21355462562699 is a prime.

Together with 21355462562699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21355462502701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677731281350 + 10677731281351.

It is an arithmetic number, because the mean of its divisors is an integer number (10677731281351).

Almost surely, 2^{21355462562701} is an apocalyptic number.

It is an amenable number.

21355462562701 is a deficient number, since it is larger than the sum of its proper divisors (1).

21355462562701 is an equidigital number, since it uses as much as digits as its factorization.

21355462562701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 21355462562701 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-two million, five hundred sixty-two thousand, seven hundred one".