1222211220000 has 120 divisors (see below), whose sum is σ = 4009097440656. Its totient is φ = 325922976000.

The previous prime is 1222211219987. The next prime is 1222211220019. The reversal of 1222211220000 is 221122221.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10125094 + ... + 10245093.

Almost surely, 2^{1222211220000} is an apocalyptic number.

1222211220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222211220000 is an abundant number, since it is smaller than the sum of its proper divisors (2786886220656).

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

1222211220000 is an equidigital number, since it uses as much as digits as its factorization.

1222211220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20370220 (or 20370197 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1222211220000 its reverse (221122221), we get a palindrome (1222432342221).

The spelling of 1222211220000 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twenty thousand".