3111200323261 has 2 divisors, whose sum is σ = 3111200323262. Its totient is φ = 3111200323260.

The previous prime is 3111200323249. The next prime is 3111200323391. The reversal of 3111200323261 is 1623230021113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1745794051225 + 1365406272036 = 1321285^2 + 1168506^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111200323261 - 2¹⁷ = 3111200192189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111200323201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555600161630 + 1555600161631.

It is an arithmetic number, because the mean of its divisors is an integer number (1555600161631).

Almost surely, 2^{3111200323261} is an apocalyptic number.

It is an amenable number.

3111200323261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111200323261 is an equidigital number, since it uses as much as digits as its factorization.

3111200323261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 3111200323261 its reverse (1623230021113), we get a palindrome (4734430344374).

The spelling of 3111200323261 in words is "three trillion, one hundred eleven billion, two hundred million, three hundred twenty-three thousand, two hundred sixty-one".