121220012122000 has 480 divisors, whose sum is σ = 350830239177600. Its totient is φ = 40319959680000.

The previous prime is 121220012121947. The next prime is 121220012122039. The reversal of 121220012122000 is 221210022121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 132887455 + ... + 133796545.

It is an arithmetic number, because the mean of its divisors is an integer number (730896331620).

Almost surely, 2^{121220012122000} is an apocalyptic number.

121220012122000 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 121220012122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175415119588800).

121220012122000 is an abundant number, since it is smaller than the sum of its proper divisors (229610227055600).

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

121220012122000 is a wasteful number, since it uses less digits than its factorization.

121220012122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909184 (or 909157 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220012122000 its reverse (221210022121), we get a palindrome (121441222144121).

It can be divided in two parts, 1212200121 and 22000, that added together give a palindrome (1212222121).

The spelling of 121220012122000 in words is "one hundred twenty-one trillion, two hundred twenty billion, twelve million, one hundred twenty-two thousand".