1220210128 has 10 divisors (see below), whose sum is σ = 2364157154. Its totient is φ = 610105056.

The previous prime is 1220210107. The next prime is 1220210129. The reversal of 1220210128 is 8210120221.

It can be written as a sum of positive squares in only one way, i.e., 1186940304 + 33269824 = 34452^2 + 5768^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38131551 + ... + 38131582.

Almost surely, 2^1220210128 is an apocalyptic number.

It is an amenable number.

1220210128 is a deficient number, since it is larger than the sum of its proper divisors (1143947026).

1220210128 is an equidigital number, since it uses as much as digits as its factorization.

1220210128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76263141 (or 76263135 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1220210128 is about 34931.5062372065. The cubic root of 1220210128 is about 1068.5910730794.

Adding to 1220210128 its reverse (8210120221), we get a palindrome (9430330349).

The spelling of 1220210128 in words is "one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-eight".