121212122000100 has 144 divisors (see below), whose sum is σ = 360198961499328. Its totient is φ = 31448468712960.

The previous prime is 121212122000077. The next prime is 121212122000117. The reversal of 121212122000100 is 1000221212121.

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 121212122000100.

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, 323344374 + ... + 323719026.

Almost surely, 2^{121212122000100} is an apocalyptic number.

121212122000100 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 121212122000100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180099480749664).

121212122000100 is an abundant number, since it is smaller than the sum of its proper divisors (238986839499228).

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

121212122000100 is a wasteful number, since it uses less digits than its factorization.

121212122000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403854 (or 403847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121212122000100 its reverse (1000221212121), we get a palindrome (122212343212221).

The spelling of 121212122000100 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred", and thus it is an aban number.