121220200200000 has 336 divisors, whose sum is σ = 437329005277248. Its totient is φ = 29386713600000.

The previous prime is 121220200199957. The next prime is 121220200200023. The reversal of 121220200200000 is 2002022121.

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

It is a congruent number.

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, 2583349 + ... + 15783348.

It is an arithmetic number, because the mean of its divisors is an integer number (1301574420468).

Almost surely, 2^{121220200200000} is an apocalyptic number.

121220200200000 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 121220200200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218664502638624).

121220200200000 is an abundant number, since it is smaller than the sum of its proper divisors (316108805077248).

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

121220200200000 is an equidigital number, since it uses as much as digits as its factorization.

121220200200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18366748 (or 18366718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121220200200000 its reverse (2002022121), we get a palindrome (121222202222121).

The spelling of 121220200200000 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred million, two hundred thousand".