10221091 has 2 divisors, whose sum is σ = 10221092. Its totient is φ = 10221090.

The previous prime is 10221083. The next prime is 10221149. The reversal of 10221091 is 19012201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10221091 - 2³ = 10221083 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110545 + 5110546.

It is an arithmetic number, because the mean of its divisors is an integer number (5110546).

Almost surely, 2^10221091 is an apocalyptic number.

10221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221091 is an equidigital number, since it uses as much as digits as its factorization.

10221091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 10221091 is about 3197.0441035431. The cubic root of 10221091 is about 217.0196631081.

Adding to 10221091 its reverse (19012201), we get a palindrome (29233292).

The spelling of 10221091 in words is "ten million, two hundred twenty-one thousand, ninety-one".