123221149 has 2 divisors, whose sum is σ = 123221150. Its totient is φ = 123221148.

The previous prime is 123221141. The next prime is 123221173. The reversal of 123221149 is 941122321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 56145049 = 8190^2 + 7493^2 .

It is a cyclic number.

It is not a de Polignac number, because 123221149 - 2³ = 123221141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610574 + 61610575.

It is an arithmetic number, because the mean of its divisors is an integer number (61610575).

Almost surely, 2^123221149 is an apocalyptic number.

It is an amenable number.

123221149 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221149 is an equidigital number, since it uses as much as digits as its factorization.

123221149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 123221149 is about 11100.5021958468. The cubic root of 123221149 is about 497.6168579812.

The spelling of 123221149 in words is "one hundred twenty-three million, two hundred twenty-one thousand, one hundred forty-nine".