78111110222212 has 12 divisors (see below), whose sum is σ = 136697614534656. Its totient is φ = 39054648926600.

The previous prime is 78111110222209. The next prime is 78111110222269. The reversal of 78111110222212 is 21222201111187.

It is a happy number.

It is a super-2 number, since 2×78111110222212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226352164 + ... + 226696987.

It is an arithmetic number, because the mean of its divisors is an integer number (11391467877888).

Almost surely, 2^{78111110222212} is an apocalyptic number.

It is an amenable number.

78111110222212 is a deficient number, since it is larger than the sum of its proper divisors (58586504312444).

78111110222212 is a wasteful number, since it uses less digits than its factorization.

78111110222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453092258 (or 453092256 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 31.

Adding to 78111110222212 its reverse (21222201111187), we get a palindrome (99333311333399).

The spelling of 78111110222212 in words is "seventy-eight trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-two thousand, two hundred twelve".