21522003504011 has 2 divisors, whose sum is σ = 21522003504012. Its totient is φ = 21522003504010.

The previous prime is 21522003503977. The next prime is 21522003504041. The reversal of 21522003504011 is 11040530022512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21522003504011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21522003504041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761001752005 + 10761001752006.

It is an arithmetic number, because the mean of its divisors is an integer number (10761001752006).

Almost surely, 2^{21522003504011} is an apocalyptic number.

21522003504011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522003504011 is an equidigital number, since it uses as much as digits as its factorization.

21522003504011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 21522003504011 its reverse (11040530022512), we get a palindrome (32562533526523).

The spelling of 21522003504011 in words is "twenty-one trillion, five hundred twenty-two billion, three million, five hundred four thousand, eleven".