121212110210000 has 400 divisors, whose sum is σ = 315362259273600. Its totient is φ = 44955543552000.

The previous prime is 121212110209997. The next prime is 121212110210011. The reversal of 121212110210000 is 12011212121.

It is a tau number, because it is divible by the number of its divisors (400).

It is a super-2 number, since 2×121212110210000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5065478036 + ... + 5065501964.

It is an arithmetic number, because the mean of its divisors is an integer number (788405648184).

Almost surely, 2^{121212110210000} is an apocalyptic number.

121212110210000 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 121212110210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157681129636800).

121212110210000 is an abundant number, since it is smaller than the sum of its proper divisors (194150149063600).

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

121212110210000 is a wasteful number, since it uses less digits than its factorization.

121212110210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24416 (or 24395 counting only the distinct ones).

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

Adding to 121212110210000 its reverse (12011212121), we get a palindrome (121224121422121).

The spelling of 121212110210000 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred ten million, two hundred ten thousand".