780101112 has 128 divisors (see below), whose sum is σ = 2350448640. Its totient is φ = 211040640.

The previous prime is 780101111. The next prime is 780101197. The reversal of 780101112 is 211101087.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780101111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243183 + ... + 246369.

It is an arithmetic number, because the mean of its divisors is an integer number (18362880).

Almost surely, 2^780101112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175224320).

780101112 is an abundant number, since it is smaller than the sum of its proper divisors (1570347528).

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

780101112 is a wasteful number, since it uses less digits than its factorization.

780101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 780101112 is about 27930.2902240560. The cubic root of 780101112 is about 920.5561822830.

Adding to 780101112 its reverse (211101087), we get a palindrome (991202199).

The spelling of 780101112 in words is "seven hundred eighty million, one hundred one thousand, one hundred twelve".