11222220078 has 48 divisors (see below), whose sum is σ = 25610083200. Its totient is φ = 3541706640.

The previous prime is 11222220077. The next prime is 11222220143. The reversal of 11222220078 is 87002222211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222220077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 610303 + ... + 628421.

It is an arithmetic number, because the mean of its divisors is an integer number (533543400).

Almost surely, 2^11222220078 is an apocalyptic number.

11222220078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11222220078 is an abundant number, since it is smaller than the sum of its proper divisors (14387863122).

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

11222220078 is a wasteful number, since it uses less digits than its factorization.

11222220078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19957 (or 19954 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

Adding to 11222220078 its reverse (87002222211), we get a palindrome (98224442289).

The spelling of 11222220078 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, seventy-eight".