123227730991 has 2 divisors, whose sum is σ = 123227730992. Its totient is φ = 123227730990.

The previous prime is 123227730949. The next prime is 123227731013. The reversal of 123227730991 is 199037722321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123227730991 - 2⁷ = 123227730863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123227730091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61613865495 + 61613865496.

It is an arithmetic number, because the mean of its divisors is an integer number (61613865496).

Almost surely, 2^123227730991 is an apocalyptic number.

123227730991 is a deficient number, since it is larger than the sum of its proper divisors (1).

123227730991 is an equidigital number, since it uses as much as digits as its factorization.

123227730991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The spelling of 123227730991 in words is "one hundred twenty-three billion, two hundred twenty-seven million, seven hundred thirty thousand, nine hundred ninety-one".