1220211331 has 8 divisors (see below), whose sum is σ = 1291161600. Its totient is φ = 1149933960.

The previous prime is 1220211313. The next prime is 1220211353. The reversal of 1220211331 is 1331120221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220211331 - 2¹¹ = 1220209283 is a prime.

It is a super-2 number, since 2×1220211331² = 2977831384601583122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220211631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164491 + ... + 171748.

It is an arithmetic number, because the mean of its divisors is an integer number (161395200).

Almost surely, 2^1220211331 is an apocalyptic number.

1220211331 is a deficient number, since it is larger than the sum of its proper divisors (70950269).

1220211331 is a wasteful number, since it uses less digits than its factorization.

1220211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336449.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1220211331 is about 34931.5234566144. The cubic root of 1220211331 is about 1068.5914242524.

Adding to 1220211331 its reverse (1331120221), we get a palindrome (2551331552).

The spelling of 1220211331 in words is "one billion, two hundred twenty million, two hundred eleven thousand, three hundred thirty-one".