1222121000000 has 196 divisors, whose sum is σ = 3055580888064. Its totient is φ = 484948800000.

The previous prime is 1222120999991. The next prime is 1222121000033. The reversal of 1222121000000 is 1212221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 126995189 + ... + 127004811.

Almost surely, 2^{1222121000000} is an apocalyptic number.

1222121000000 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 1222121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527790444032).

1222121000000 is an abundant number, since it is smaller than the sum of its proper divisors (1833459888064).

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

1222121000000 is an frugal number, since it uses more digits than its factorization.

1222121000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9792 (or 9757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1222121000000 its reverse (1212221), we get a palindrome (1222122212221).

The spelling of 1222121000000 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million", and thus it is an aban number.