1220255001 has 48 divisors (see below), whose sum is σ = 2038533120. Its totient is φ = 688992480.

The previous prime is 1220254999. The next prime is 1220255017. The reversal of 1220255001 is 1005520221.

It is not a de Polignac number, because 1220255001 - 2¹ = 1220254999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225255001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3398860 + ... + 3399218.

It is an arithmetic number, because the mean of its divisors is an integer number (42469440).

Almost surely, 2^1220255001 is an apocalyptic number.

It is an amenable number.

1220255001 is a deficient number, since it is larger than the sum of its proper divisors (818278119).

1220255001 is a wasteful number, since it uses less digits than its factorization.

1220255001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1220255001 is about 34932.1485311167. The cubic root of 1220255001 is about 1068.6041719980.

Adding to 1220255001 its reverse (1005520221), we get a palindrome (2225775222).

The spelling of 1220255001 in words is "one billion, two hundred twenty million, two hundred fifty-five thousand, one".