111020111010 has 48 divisors (see below), whose sum is σ = 298605822840. Its totient is φ = 28584487680.

The previous prime is 111020110997. The next prime is 111020111053. The reversal of 111020111010 is 10111020111.

It can be written as a sum of positive squares in 4 ways, for example, as 104263764201 + 6756346809 = 322899^2 + 82197^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111020110983 and 111020111001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21265611 + ... + 21270830.

Almost surely, 2^111020111010 is an apocalyptic number.

111020111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111020111010 is an abundant number, since it is smaller than the sum of its proper divisors (187585711830).

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

111020111010 is a wasteful number, since it uses less digits than its factorization.

111020111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42536483 (or 42536480 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111020111010 its reverse (10111020111), we get a palindrome (121131131121).

It can be divided in two parts, 1110201 and 11010, that added together give a palindrome (1121211).

The spelling of 111020111010 in words is "one hundred eleven billion, twenty million, one hundred eleven thousand, ten".