121012221000000 has 588 divisors, whose sum is σ = 439909907206112. Its totient is φ = 29336208000000.

The previous prime is 121012220999987. The next prime is 121012221000007. The reversal of 121012221000000 is 122210121.

121012221000000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 121012221000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012221000007) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 362833317 + ... + 363166683.

Almost surely, 2^{121012221000000} is an apocalyptic number.

121012221000000 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 121012221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219954953603056).

121012221000000 is an abundant number, since it is smaller than the sum of its proper divisors (318897686206112).

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

121012221000000 is an frugal number, since it uses more digits than its factorization.

121012221000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333434 (or 333388 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121012221000000 its reverse (122210121), we get a palindrome (121012343210121).

The spelling of 121012221000000 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty-one million", and thus it is an aban number.