111021212010078 has 80 divisors (see below), whose sum is σ = 252246238889040. Its totient is φ = 36490183599744.

The previous prime is 111021212010077. The next prime is 111021212010103. The reversal of 111021212010078 is 870010212120111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021212010077) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42207633 + ... + 44760771.

It is an arithmetic number, because the mean of its divisors is an integer number (3153077986113).

Almost surely, 2^{111021212010078} is an apocalyptic number.

111021212010078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111021212010078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126123119444520).

111021212010078 is an abundant number, since it is smaller than the sum of its proper divisors (141225026878962).

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

111021212010078 is a wasteful number, since it uses less digits than its factorization.

111021212010078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556903 (or 2556894 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 27.

Adding to 111021212010078 its reverse (870010212120111), we get a palindrome (981031424130189).

The spelling of 111021212010078 in words is "one hundred eleven trillion, twenty-one billion, two hundred twelve million, ten thousand, seventy-eight".