1212122011100 has 432 divisors, whose sum is σ = 3648455233920. Its totient is φ = 343523980800.

The previous prime is 1212122011063. The next prime is 1212122011117. The reversal of 1212122011100 is 11102212121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 46933991 + ... + 46959809.

Almost surely, 2^{1212122011100} is an apocalyptic number.

1212122011100 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 1212122011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824227616960).

1212122011100 is an abundant number, since it is smaller than the sum of its proper divisors (2436333222820).

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

1212122011100 is a wasteful number, since it uses less digits than its factorization.

1212122011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25938 (or 25924 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212122011100 its reverse (11102212121), we get a palindrome (1223224223221).

It can be divided in two parts, 121212 and 2011100, that added together give a palindrome (2132312).

The spelling of 1212122011100 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, one hundred".