1220501331 has 32 divisors (see below), whose sum is σ = 2105464320. Its totient is φ = 684264672.

The previous prime is 1220501327. The next prime is 1220501389. The reversal of 1220501331 is 1331050221.

It is not a de Polignac number, because 1220501331 - 2² = 1220501327 is a prime.

It is a super-2 number, since 2×1220501331² = 2979246997945543122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220502331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50905 + ... + 70938.

It is an arithmetic number, because the mean of its divisors is an integer number (65795760).

Almost surely, 2^1220501331 is an apocalyptic number.

1220501331 is a deficient number, since it is larger than the sum of its proper divisors (884962989).

1220501331 is a wasteful number, since it uses less digits than its factorization.

1220501331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121912 (or 121906 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1220501331 is about 34935.6741884281. The cubic root of 1220501331 is about 1068.6760726950.

Adding to 1220501331 its reverse (1331050221), we get a palindrome (2551551552).

The spelling of 1220501331 in words is "one billion, two hundred twenty million, five hundred one thousand, three hundred thirty-one".