111121222021210 has 32 divisors (see below), whose sum is σ = 202783819412160. Its totient is φ = 43835788975488.

The previous prime is 111121222021193. The next prime is 111121222021213. The reversal of 111121222021210 is 12120222121111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111121222021213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117173592 + ... + 118118131.

It is an arithmetic number, because the mean of its divisors is an integer number (6336994356630).

Almost surely, 2^{111121222021210} is an apocalyptic number.

111121222021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111121222021210 is a deficient number, since it is larger than the sum of its proper divisors (91662597390950).

111121222021210 is a wasteful number, since it uses less digits than its factorization.

111121222021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235292382.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111121222021210 its reverse (12120222121111), we get a palindrome (123241444142321).

Subtracting from 111121222021210 its reverse (12120222121111), we obtain a palindrome (99000999900099).

The spelling of 111121222021210 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred ten".