3011131220 has 24 divisors (see below), whose sum is σ = 6369537384. Its totient is φ = 1195659776.

The previous prime is 3011131157. The next prime is 3011131237. The reversal of 3011131220 is 221311103.

It can be written as a sum of positive squares in 4 ways, for example, as 187909264 + 2823221956 = 13708^2 + 53134^2 .

It is a super-2 number, since 2×3011131220² = 18133822448117376800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3011131195 and 3011131204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546737 + ... + 552216.

It is an arithmetic number, because the mean of its divisors is an integer number (265397391).

Almost surely, 2^3011131220 is an apocalyptic number.

It is an amenable number.

3011131220 is an abundant number, since it is smaller than the sum of its proper divisors (3358406164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3011131220 is a wasteful number, since it uses less digits than its factorization.

3011131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099099 (or 1099097 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 3011131220 is about 54873.7753394096. The cubic root of 3011131220 is about 1444.0311461375.

Adding to 3011131220 its reverse (221311103), we get a palindrome (3232442323).

The spelling of 3011131220 in words is "three billion, eleven million, one hundred thirty-one thousand, two hundred twenty".