1223121222000 has 200 divisors, whose sum is σ = 4418005040592. Its totient is φ = 326165616000.

The previous prime is 1223121221923. The next prime is 1223121222047. The reversal of 1223121222000 is 2221213221.

1223121222000 is a `hidden beast` number, since 1 + 2 + 231 + 212 + 220 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3613066 + ... + 3937065.

Almost surely, 2^{1223121222000} is an apocalyptic number.

1223121222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223121222000 is an abundant number, since it is smaller than the sum of its proper divisors (3194883818592).

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

1223121222000 is an equidigital number, since it uses as much as digits as its factorization.

1223121222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550166 (or 7550141 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1223121222000 its reverse (2221213221), we get a palindrome (1225342435221).

The spelling of 1223121222000 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-one million, two hundred twenty-two thousand".