111111221210010 has 128 divisors (see below), whose sum is σ = 313347450544128. Its totient is φ = 24685985088000.

The previous prime is 111111221209999. The next prime is 111111221210021. The reversal of 111111221210010 is 10012122111111.

It is an interprime number because it is at equal distance from previous prime (111111221209999) and next prime (111111221210021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21476476 + ... + 26143095.

It is an arithmetic number, because the mean of its divisors is an integer number (2448026957376).

Almost surely, 2^{111111221210010} is an apocalyptic number.

111111221210010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111221210010 is an abundant number, since it is smaller than the sum of its proper divisors (202236229334118).

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

111111221210010 is a wasteful number, since it uses less digits than its factorization.

111111221210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47619900.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111111221210010 its reverse (10012122111111), we get a palindrome (121123343321121).

The spelling of 111111221210010 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, ten".