78012110122 has 4 divisors (see below), whose sum is σ = 117018165186. Its totient is φ = 39006055060.

The previous prime is 78012110093. The next prime is 78012110177. The reversal of 78012110122 is 22101121087.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 75773022361 + 2239087761 = 275269^2 + 47319^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19503027529 + ... + 19503027532.

Almost surely, 2^78012110122 is an apocalyptic number.

78012110122 is a deficient number, since it is larger than the sum of its proper divisors (39006055064).

78012110122 is a wasteful number, since it uses less digits than its factorization.

78012110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006055063.

The product of its (nonzero) digits is 448, while the sum is 25.

The spelling of 78012110122 in words is "seventy-eight billion, twelve million, one hundred ten thousand, one hundred twenty-two".