77811222112103 has 4 divisors (see below), whose sum is σ = 78241118367048. Its totient is φ = 77381325857160.

The previous prime is 77811222112081. The next prime is 77811222112121. The reversal of 77811222112103 is 30121122211877.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77811222112103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77811222112003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214948127201 + ... + 214948127562.

It is an arithmetic number, because the mean of its divisors is an integer number (19560279591762).

Almost surely, 2^{77811222112103} is an apocalyptic number.

77811222112103 is a deficient number, since it is larger than the sum of its proper divisors (429896254945).

77811222112103 is a wasteful number, since it uses less digits than its factorization.

77811222112103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429896254944.

The product of its (nonzero) digits is 18816, while the sum is 38.

The spelling of 77811222112103 in words is "seventy-seven trillion, eight hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred three".