10123221091 has 2 divisors, whose sum is σ = 10123221092. Its totient is φ = 10123221090.

The previous prime is 10123221041. The next prime is 10123221167. The reversal of 10123221091 is 19012232101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10123221091 - 2¹³ = 10123212899 is a prime.

It is not a weakly prime, because it can be changed into another prime (10123221041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061610545 + 5061610546.

It is an arithmetic number, because the mean of its divisors is an integer number (5061610546).

Almost surely, 2^10123221091 is an apocalyptic number.

10123221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10123221091 is an equidigital number, since it uses as much as digits as its factorization.

10123221091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 10123221091 its reverse (19012232101), we get a palindrome (29135453192).

The spelling of 10123221091 in words is "ten billion, one hundred twenty-three million, two hundred twenty-one thousand, ninety-one".