781130222099 has 2 divisors, whose sum is σ = 781130222100. Its totient is φ = 781130222098.

The previous prime is 781130222057. The next prime is 781130222101. The reversal of 781130222099 is 990222031187.

It is a strong prime.

It is an emirp because it is prime and its reverse (990222031187) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-781130222099 is a prime.

It is a super-2 number, since 2×781130222099² (a number of 25 digits) contains 22 as substring.

Together with 781130222101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (781130222009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390565111049 + 390565111050.

It is an arithmetic number, because the mean of its divisors is an integer number (390565111050).

Almost surely, 2^781130222099 is an apocalyptic number.

781130222099 is a deficient number, since it is larger than the sum of its proper divisors (1).

781130222099 is an equidigital number, since it uses as much as digits as its factorization.

781130222099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 781130222099 in words is "seven hundred eighty-one billion, one hundred thirty million, two hundred twenty-two thousand, ninety-nine".