3130311221 has 4 divisors (see below), whose sum is σ = 3177032352. Its totient is φ = 3083590092.

The previous prime is 3130311209. The next prime is 3130311323. The reversal of 3130311221 is 1221130313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3130311221 - 2⁶ = 3130311157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3130311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3130314221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23360465 + ... + 23360598.

It is an arithmetic number, because the mean of its divisors is an integer number (794258088).

Almost surely, 2^3130311221 is an apocalyptic number.

It is an amenable number.

3130311221 is a deficient number, since it is larger than the sum of its proper divisors (46721131).

3130311221 is an equidigital number, since it uses as much as digits as its factorization.

3130311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46721130.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3130311221 is about 55949.1842746612. The cubic root of 3130311221 is about 1462.8366725432.

Adding to 3130311221 its reverse (1221130313), we get a palindrome (4351441534).

It can be divided in two parts, 31303 and 11221, that added together give a palindrome (42524).

The spelling of 3130311221 in words is "three billion, one hundred thirty million, three hundred eleven thousand, two hundred twenty-one".