11021081 has 2 divisors, whose sum is σ = 11021082. Its totient is φ = 11021080.

The previous prime is 11021069. The next prime is 11021113. The reversal of 11021081 is 18012011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 2371600 = 2941^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021081 is a prime.

It is a super-2 number, since 2×11021081² = 242928452817122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11021011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510540 + 5510541.

It is an arithmetic number, because the mean of its divisors is an integer number (5510541).

Almost surely, 2^11021081 is an apocalyptic number.

It is an amenable number.

11021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021081 is an equidigital number, since it uses as much as digits as its factorization.

11021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 11021081 is about 3319.8013494786. The cubic root of 11021081 is about 222.5399902871.

Adding to 11021081 its reverse (18012011), we get a palindrome (29033092).

The spelling of 11021081 in words is "eleven million, twenty-one thousand, eighty-one".