21310539948011 has 2 divisors, whose sum is σ = 21310539948012. Its totient is φ = 21310539948010.

The previous prime is 21310539947969. The next prime is 21310539948029. The reversal of 21310539948011 is 11084993501312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21310539948011 - 2⁶ = 21310539947947 is a prime.

It is a super-2 number, since 2×21310539948011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21310539941011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655269974005 + 10655269974006.

It is an arithmetic number, because the mean of its divisors is an integer number (10655269974006).

Almost surely, 2^{21310539948011} is an apocalyptic number.

21310539948011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310539948011 is an equidigital number, since it uses as much as digits as its factorization.

21310539948011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 21310539948011 in words is "twenty-one trillion, three hundred ten billion, five hundred thirty-nine million, nine hundred forty-eight thousand, eleven".