2321110111261 has 2 divisors, whose sum is σ = 2321110111262. Its totient is φ = 2321110111260.

The previous prime is 2321110111193. The next prime is 2321110111267. The reversal of 2321110111261 is 1621110111232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172847846361 + 1148262264900 = 1082981^2 + 1071570^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321110111261 - 2³¹ = 2318962627613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321110111267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160555055630 + 1160555055631.

It is an arithmetic number, because the mean of its divisors is an integer number (1160555055631).

Almost surely, 2^{2321110111261} is an apocalyptic number.

It is an amenable number.

2321110111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321110111261 is an equidigital number, since it uses as much as digits as its factorization.

2321110111261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 2321110111261 its reverse (1621110111232), we get a palindrome (3942220222493).

The spelling of 2321110111261 in words is "two trillion, three hundred twenty-one billion, one hundred ten million, one hundred eleven thousand, two hundred sixty-one".