1211112231100 has 18 divisors (see below), whose sum is σ = 2628113541704. Its totient is φ = 484444892400.

The previous prime is 1211112231073. The next prime is 1211112231113. The reversal of 1211112231100 is 11322111121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6055561056 + ... + 6055561255.

Almost surely, 2^{1211112231100} is an apocalyptic number.

1211112231100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211112231100 is an abundant number, since it is smaller than the sum of its proper divisors (1417001310604).

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

1211112231100 is a wasteful number, since it uses less digits than its factorization.

1211112231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111122325 (or 12111122318 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211112231100 its reverse (11322111121), we get a palindrome (1222434342221).

The spelling of 1211112231100 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred thirty-one thousand, one hundred".