2131330100261 has 2 divisors, whose sum is σ = 2131330100262. Its totient is φ = 2131330100260.

The previous prime is 2131330100117. The next prime is 2131330100269. The reversal of 2131330100261 is 1620010331312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2130811672900 + 518427361 = 1459730^2 + 22769^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131330100261 - 2¹⁴ = 2131330083877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131330100269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065665050130 + 1065665050131.

It is an arithmetic number, because the mean of its divisors is an integer number (1065665050131).

Almost surely, 2^{2131330100261} is an apocalyptic number.

It is an amenable number.

2131330100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131330100261 is an equidigital number, since it uses as much as digits as its factorization.

2131330100261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2131330100261 its reverse (1620010331312), we get a palindrome (3751340431573).

The spelling of 2131330100261 in words is "two trillion, one hundred thirty-one billion, three hundred thirty million, one hundred thousand, two hundred sixty-one".