11051021 has 2 divisors, whose sum is σ = 11051022. Its totient is φ = 11051020.

The previous prime is 11051011. The next prime is 11051023. The reversal of 11051021 is 12015011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 1990921 = 3010^2 + 1411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11051021 is a prime.

Together with 11051023, 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 = 11050993 and 11051011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11051023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525510 + 5525511.

It is an arithmetic number, because the mean of its divisors is an integer number (5525511).

Almost surely, 2^11051021 is an apocalyptic number.

It is an amenable number.

11051021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11051021 is an equidigital number, since it uses as much as digits as its factorization.

11051021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 11051021 is about 3324.3075970794. The cubic root of 11051021 is about 222.7413263430.

Adding to 11051021 its reverse (12015011), we get a palindrome (23066032).

The spelling of 11051021 in words is "eleven million, fifty-one thousand, twenty-one".