1113212145100 has 144 divisors (see below), whose sum is σ = 2775698593920. Its totient is φ = 383260723200.

The previous prime is 1113212145079. The next prime is 1113212145109. The reversal of 1113212145100 is 15412123111.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1113212145109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35451607 + ... + 35482993.

It is an arithmetic number, because the mean of its divisors is an integer number (19275684680).

Almost surely, 2^{1113212145100} is an apocalyptic number.

1113212145100 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 1113212145100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387849296960).

1113212145100 is an abundant number, since it is smaller than the sum of its proper divisors (1662486448820).

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

1113212145100 is a wasteful number, since it uses less digits than its factorization.

1113212145100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33128 (or 33121 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 1113212145100 its reverse (15412123111), we get a palindrome (1128624268211).

The spelling of 1113212145100 in words is "one trillion, one hundred thirteen billion, two hundred twelve million, one hundred forty-five thousand, one hundred".