221130149 has 2 divisors, whose sum is σ = 221130150. Its totient is φ = 221130148.

The previous prime is 221130127. The next prime is 221130163. The reversal of 221130149 is 941031122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181980100 + 39150049 = 13490^2 + 6257^2 .

It is a cyclic number.

It is not a de Polignac number, because 221130149 - 2²⁴ = 204352933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221130109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565074 + 110565075.

It is an arithmetic number, because the mean of its divisors is an integer number (110565075).

Almost surely, 2^221130149 is an apocalyptic number.

It is an amenable number.

221130149 is a deficient number, since it is larger than the sum of its proper divisors (1).

221130149 is an equidigital number, since it uses as much as digits as its factorization.

221130149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 221130149 is about 14870.4454876107. The cubic root of 221130149 is about 604.7130200987.

The spelling of 221130149 in words is "two hundred twenty-one million, one hundred thirty thousand, one hundred forty-nine".