2231101261 has 2 divisors, whose sum is σ = 2231101262. Its totient is φ = 2231101260.

The previous prime is 2231101259. The next prime is 2231101289. The reversal of 2231101261 is 1621011322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815186025 + 415915236 = 42605^2 + 20394^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231101261 - 2¹ = 2231101259 is a prime.

It is a super-3 number, since 3×2231101261³ (a number of 29 digits) contains 333 as substring.

Together with 2231101259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231101861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115550630 + 1115550631.

It is an arithmetic number, because the mean of its divisors is an integer number (1115550631).

Almost surely, 2^2231101261 is an apocalyptic number.

It is an amenable number.

2231101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231101261 is an equidigital number, since it uses as much as digits as its factorization.

2231101261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2231101261 is about 47234.5346224561. The cubic root of 2231101261 is about 1306.6915838112.

Adding to 2231101261 its reverse (1621011322), we get a palindrome (3852112583).

The spelling of 2231101261 in words is "two billion, two hundred thirty-one million, one hundred one thousand, two hundred sixty-one".