10811621 has 2 divisors, whose sum is σ = 10811622. Its totient is φ = 10811620.

The previous prime is 10811617. The next prime is 10811623. The reversal of 10811621 is 12611801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9523396 + 1288225 = 3086^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 10811621 - 2² = 10811617 is a prime.

It is a super-2 number, since 2×10811621² = 233782297295282, which contains 22 as substring.

Together with 10811623, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10811593 and 10811602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10811623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5405810 + 5405811.

It is an arithmetic number, because the mean of its divisors is an integer number (5405811).

Almost surely, 2^10811621 is an apocalyptic number.

It is an amenable number.

10811621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10811621 is an equidigital number, since it uses as much as digits as its factorization.

10811621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 10811621 is about 3288.1029485100. The cubic root of 10811621 is about 221.1211432215.

The spelling of 10811621 in words is "ten million, eight hundred eleven thousand, six hundred twenty-one".