250122221 has 4 divisors (see below), whose sum is σ = 250220700. Its totient is φ = 250023744.

The previous prime is 250122209. The next prime is 250122227. The reversal of 250122221 is 122221052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81252196 + 168870025 = 9014^2 + 12995^2 .

It is a cyclic number.

It is not a de Polignac number, because 250122221 - 2¹⁴ = 250105837 is a prime.

It is a super-2 number, since 2×250122221² = 125122250875945682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 250122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250122227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45326 + ... + 50543.

It is an arithmetic number, because the mean of its divisors is an integer number (62555175).

Almost surely, 2^250122221 is an apocalyptic number.

It is an amenable number.

250122221 is a deficient number, since it is larger than the sum of its proper divisors (98479).

250122221 is an equidigital number, since it uses as much as digits as its factorization.

250122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98478.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 250122221 is about 15815.2527959562. The cubic root of 250122221 is about 630.0631674296.

Adding to 250122221 its reverse (122221052), we get a palindrome (372343273).

The spelling of 250122221 in words is "two hundred fifty million, one hundred twenty-two thousand, two hundred twenty-one".