220436123 has 2 divisors, whose sum is σ = 220436124. Its totient is φ = 220436122.

The previous prime is 220436039. The next prime is 220436137. The reversal of 220436123 is 321634022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220436123 - 2¹² = 220432027 is a prime.

It is a super-2 number, since 2×220436123² = 97184168646542258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220436143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110218061 + 110218062.

It is an arithmetic number, because the mean of its divisors is an integer number (110218062).

Almost surely, 2^220436123 is an apocalyptic number.

220436123 is a deficient number, since it is larger than the sum of its proper divisors (1).

220436123 is an equidigital number, since it uses as much as digits as its factorization.

220436123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 220436123 is about 14847.0913986545. The cubic root of 220436123 is about 604.0797182545.

The spelling of 220436123 in words is "two hundred twenty million, four hundred thirty-six thousand, one hundred twenty-three".