21201010110043 has 2 divisors, whose sum is σ = 21201010110044. Its totient is φ = 21201010110042.

The previous prime is 21201010109959. The next prime is 21201010110053. The reversal of 21201010110043 is 34001101010212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201010110043 is a prime.

It is a super-2 number, since 2×21201010110043² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21201010109999 and 21201010110026.

It is not a weakly prime, because it can be changed into another prime (21201010110053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600505055021 + 10600505055022.

It is an arithmetic number, because the mean of its divisors is an integer number (10600505055022).

Almost surely, 2^{21201010110043} is an apocalyptic number.

21201010110043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201010110043 is an equidigital number, since it uses as much as digits as its factorization.

21201010110043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21201010110043 its reverse (34001101010212), we get a palindrome (55202111120255).

The spelling of 21201010110043 in words is "twenty-one trillion, two hundred one billion, ten million, one hundred ten thousand, forty-three".