12101212031100 has 144 divisors (see below), whose sum is σ = 35604695736960. Its totient is φ = 3172494124800.

The previous prime is 12101212031089. The next prime is 12101212031107. The reversal of 12101212031100 is 113021210121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12101212031100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101212031107) 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, 36489831 + ... + 36819969.

Almost surely, 2^{12101212031100} is an apocalyptic number.

12101212031100 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 12101212031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17802347868480).

12101212031100 is an abundant number, since it is smaller than the sum of its proper divisors (23503483705860).

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

12101212031100 is a wasteful number, since it uses less digits than its factorization.

12101212031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332220 (or 332213 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12101212031100 its reverse (113021210121), we get a palindrome (12214233241221).

The spelling of 12101212031100 in words is "twelve trillion, one hundred one billion, two hundred twelve million, thirty-one thousand, one hundred".