111121100010 has 24 divisors (see below), whose sum is σ = 288914860260. Its totient is φ = 29632293312.

The previous prime is 111121099987. The next prime is 111121100023. The reversal of 111121100010 is 10001121111.

It can be written as a sum of positive squares in 2 ways, for example, as 109548422361 + 1572677649 = 330981^2 + 39657^2 .

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 = 111121099965 and 111121100001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617339355 + ... + 617339534.

Almost surely, 2^111121100010 is an apocalyptic number.

111121100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111121100010 is an abundant number, since it is smaller than the sum of its proper divisors (177793760250).

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

111121100010 is a wasteful number, since it uses less digits than its factorization.

111121100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234678902 (or 1234678899 counting only the distinct ones).

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

Adding to 111121100010 its reverse (10001121111), we get a palindrome (121122221121).

The spelling of 111121100010 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred thousand, ten".