1211112221110 has 96 divisors (see below), whose sum is σ = 2471424794496. Its totient is φ = 426764448000.

The previous prime is 1211112221029. The next prime is 1211112221131. The reversal of 1211112221110 is 111222111121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5638444 + ... + 5849296.

It is an arithmetic number, because the mean of its divisors is an integer number (25744008276).

Almost surely, 2^{1211112221110} is an apocalyptic number.

1211112221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211112221110 is an abundant number, since it is smaller than the sum of its proper divisors (1260312573386).

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

1211112221110 is a wasteful number, since it uses less digits than its factorization.

1211112221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211030 (or 211019 counting only the distinct ones).

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

Adding to 1211112221110 its reverse (111222111121), we get a palindrome (1322334332231).

It can be divided in two parts, 12111 and 12221110, that added together give a palindrome (12233221).

The spelling of 1211112221110 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, one hundred ten".