2011521357863 has 2 divisors, whose sum is σ = 2011521357864. Its totient is φ = 2011521357862.

The previous prime is 2011521357841. The next prime is 2011521357871. The reversal of 2011521357863 is 3687531251102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011521357863 - 2⁶ = 2011521357799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011521357893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005760678931 + 1005760678932.

It is an arithmetic number, because the mean of its divisors is an integer number (1005760678932).

Almost surely, 2^{2011521357863} is an apocalyptic number.

2011521357863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011521357863 is an equidigital number, since it uses as much as digits as its factorization.

2011521357863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 2011521357863 in words is "two trillion, eleven billion, five hundred twenty-one million, three hundred fifty-seven thousand, eight hundred sixty-three".