1222165776000 has 512 divisors, whose sum is σ = 4373114054400. Its totient is φ = 300152832000.

The previous prime is 1222165775953. The next prime is 1222165776017. The reversal of 1222165776000 is 6775612221.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1222165776000.

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, 306382006 + ... + 306385994.

Almost surely, 2^{1222165776000} is an apocalyptic number.

1222165776000 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 1222165776000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2186557027200).

1222165776000 is an abundant number, since it is smaller than the sum of its proper divisors (3150948278400).

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

1222165776000 is a wasteful number, since it uses less digits than its factorization.

1222165776000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 1222165776000 in words is "one trillion, two hundred twenty-two billion, one hundred sixty-five million, seven hundred seventy-six thousand".