111211001122100 has 144 divisors (see below), whose sum is σ = 272346238058496. Its totient is φ = 39051303984000.

The previous prime is 111211001122097. The next prime is 111211001122121. The reversal of 111211001122100 is 1221100112111.

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, 12266357 + ... + 19310243.

Almost surely, 2^{111211001122100} is an apocalyptic number.

111211001122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111211001122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136173119029248).

111211001122100 is an abundant number, since it is smaller than the sum of its proper divisors (161135236936396).

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

111211001122100 is a wasteful number, since it uses less digits than its factorization.

111211001122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7044406 (or 7044399 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111211001122100 its reverse (1221100112111), we get a palindrome (112432101234211).

The spelling of 111211001122100 in words is "one hundred eleven trillion, two hundred eleven billion, one million, one hundred twenty-two thousand, one hundred".