11212212078 has 32 divisors (see below), whose sum is σ = 24920190720. Its totient is φ = 3736779480.

The previous prime is 11212212073. The next prime is 11212212133. The reversal of 11212212078 is 87021221211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212212073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401593 + ... + 428603.

It is an arithmetic number, because the mean of its divisors is an integer number (778755960).

Almost surely, 2^11212212078 is an apocalyptic number.

11212212078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11212212078 is an abundant number, since it is smaller than the sum of its proper divisors (13707978642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11212212078 is a wasteful number, since it uses less digits than its factorization.

11212212078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34709 (or 34703 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 11212212078 its reverse (87021221211), we get a palindrome (98233433289).

The spelling of 11212212078 in words is "eleven billion, two hundred twelve million, two hundred twelve thousand, seventy-eight".