3031131121261 has 2 divisors, whose sum is σ = 3031131121262. Its totient is φ = 3031131121260.

The previous prime is 3031131121253. The next prime is 3031131121387. The reversal of 3031131121261 is 1621211311303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1811473728100 + 1219657393161 = 1345910^2 + 1104381^2 .

It is an emirp because it is prime and its reverse (1621211311303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3031131121261 - 2³ = 3031131121253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3031131121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515565560630 + 1515565560631.

It is an arithmetic number, because the mean of its divisors is an integer number (1515565560631).

Almost surely, 2^{3031131121261} is an apocalyptic number.

It is an amenable number.

3031131121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3031131121261 is an equidigital number, since it uses as much as digits as its factorization.

3031131121261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 3031131121261 its reverse (1621211311303), we get a palindrome (4652342432564).

The spelling of 3031131121261 in words is "three trillion, thirty-one billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred sixty-one".