3011012221 has 6 divisors (see below), whose sum is σ = 3502606110. Its totient is φ = 2580867576.

The previous prime is 3011012209. The next prime is 3011012267. The reversal of 3011012221 is 1222101103.

It can be written as a sum of positive squares in only one way, i.e., 2533108900 + 477903321 = 50330^2 + 21861^2 .

It is not a de Polignac number, because 3011012221 - 2¹⁵ = 3010979453 is a prime.

It is a super-2 number, since 2×3011012221² = 18132389190022705682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3011012281) 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 5 ways as a sum of consecutive naturals, for example, 30724566 + ... + 30724663.

It is an arithmetic number, because the mean of its divisors is an integer number (583767685).

Almost surely, 2^3011012221 is an apocalyptic number.

It is an amenable number.

3011012221 is a deficient number, since it is larger than the sum of its proper divisors (491593889).

3011012221 is an equidigital number, since it uses as much as digits as its factorization.

3011012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61449243 (or 61449236 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 3011012221 is about 54872.6910311495. The cubic root of 3011012221 is about 1444.0121233281.

Adding to 3011012221 its reverse (1222101103), we get a palindrome (4233113324).

The spelling of 3011012221 in words is "three billion, eleven million, twelve thousand, two hundred twenty-one".