3031331012221 has 4 divisors (see below), whose sum is σ = 3054470943744. Its totient is φ = 3008191080700.

The previous prime is 3031331012209. The next prime is 3031331012233. The reversal of 3031331012221 is 1222101331303.

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 an interprime number because it is at equal distance from previous prime (3031331012209) and next prime (3031331012233).

It is a cyclic number.

It is not a de Polignac number, because 3031331012221 - 2¹¹ = 3031331010173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3031331012192 and 3031331012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031331012261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11569965565 + ... + 11569965826.

It is an arithmetic number, because the mean of its divisors is an integer number (763617735936).

Almost surely, 2^{3031331012221} is an apocalyptic number.

It is an amenable number.

3031331012221 is a deficient number, since it is larger than the sum of its proper divisors (23139931523).

3031331012221 is a wasteful number, since it uses less digits than its factorization.

3031331012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23139931522.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 3031331012221 its reverse (1222101331303), we get a palindrome (4253432343524).

The spelling of 3031331012221 in words is "three trillion, thirty-one billion, three hundred thirty-one million, twelve thousand, two hundred twenty-one".