1220121303000 has 128 divisors (see below), whose sum is σ = 3808391670720. Its totient is φ = 325227801600.

The previous prime is 1220121302951. The next prime is 1220121303013. The reversal of 1220121303000 is 3031210221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7094022 + ... + 7263978.

Almost surely, 2^{1220121303000} is an apocalyptic number.

1220121303000 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 1220121303000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904195835360).

1220121303000 is an abundant number, since it is smaller than the sum of its proper divisors (2588270367720).

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

1220121303000 is a wasteful number, since it uses less digits than its factorization.

1220121303000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172374 (or 172360 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1220121303000 its reverse (3031210221), we get a palindrome (1223152513221).

The spelling of 1220121303000 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, three hundred three thousand".