100002311261 has 2 divisors, whose sum is σ = 100002311262. Its totient is φ = 100002311260.

The previous prime is 100002311257. The next prime is 100002311263. The reversal of 100002311261 is 162113200001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92033356900 + 7968954361 = 303370^2 + 89269^2 .

It is a cyclic number.

It is not a de Polignac number, because 100002311261 - 2² = 100002311257 is a prime.

Together with 100002311263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100002311263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001155630 + 50001155631.

It is an arithmetic number, because the mean of its divisors is an integer number (50001155631).

Almost surely, 2^100002311261 is an apocalyptic number.

It is an amenable number.

100002311261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100002311261 is an equidigital number, since it uses as much as digits as its factorization.

100002311261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 100002311261 its reverse (162113200001), we get a palindrome (262115511262).

The spelling of 100002311261 in words is "one hundred billion, two million, three hundred eleven thousand, two hundred sixty-one".