1221104234000 has 320 divisors, whose sum is σ = 3397657536000. Its totient is φ = 415795968000.

The previous prime is 1221104233949. The next prime is 1221104234027. The reversal of 1221104234000 is 4324011221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2399025746 + ... + 2399026254.

It is an arithmetic number, because the mean of its divisors is an integer number (10617679800).

Almost surely, 2^{1221104234000} is an apocalyptic number.

1221104234000 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 1221104234000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698828768000).

1221104234000 is an abundant number, since it is smaller than the sum of its proper divisors (2176553302000).

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

1221104234000 is a wasteful number, since it uses less digits than its factorization.

1221104234000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221104234000 its reverse (4324011221), we get a palindrome (1225428245221).

The spelling of 1221104234000 in words is "one trillion, two hundred twenty-one billion, one hundred four million, two hundred thirty-four thousand".