1111221212110 has 64 divisors (see below), whose sum is σ = 2054752634880. Its totient is φ = 432449539200.

The previous prime is 1111221212083. The next prime is 1111221212117. The reversal of 1111221212110 is 112121221111.

It is a super-2 number, since 2×1111221212110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221212117) 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, 140639160 + ... + 140647060.

It is an arithmetic number, because the mean of its divisors is an integer number (32105509920).

Almost surely, 2^{1111221212110} is an apocalyptic number.

1111221212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1111221212110 is a deficient number, since it is larger than the sum of its proper divisors (943531422770).

1111221212110 is a wasteful number, since it uses less digits than its factorization.

1111221212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9193.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1111221212110 its reverse (112121221111), we get a palindrome (1223342433221).

Subtracting from 1111221212110 its reverse (112121221111), we obtain a palindrome (999099990999).

The spelling of 1111221212110 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ten".