121212102001100 has 108 divisors (see below), whose sum is σ = 289140539987712. Its totient is φ = 44073372604800.

The previous prime is 121212102001049. The next prime is 121212102001129. The reversal of 121212102001100 is 1100201212121.

It is a super-3 number, since 3×121212102001100³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 143605502 + ... + 144447098.

Almost surely, 2^{121212102001100} is an apocalyptic number.

121212102001100 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 121212102001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144570269993856).

121212102001100 is an abundant number, since it is smaller than the sum of its proper divisors (167928437986612).

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

121212102001100 is a wasteful number, since it uses less digits than its factorization.

121212102001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853536 (or 853518 counting only the distinct ones).

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

Adding to 121212102001100 its reverse (1100201212121), we get a palindrome (122312303213221).

The spelling of 121212102001100 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred two million, one thousand, one hundred".