1222164177828 has 96 divisors (see below), whose sum is σ = 3280754964480. Its totient is φ = 350211600000.

The previous prime is 1222164177763. The next prime is 1222164177833. The reversal of 1222164177828 is 8287714612221.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 906453 + ... + 1807203.

It is an arithmetic number, because the mean of its divisors is an integer number (34174530880).

Almost surely, 2^{1222164177828} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222164177828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640377482240).

1222164177828 is an abundant number, since it is smaller than the sum of its proper divisors (2058590786652).

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

1222164177828 is a wasteful number, since it uses less digits than its factorization.

1222164177828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901329 (or 901327 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The spelling of 1222164177828 in words is "one trillion, two hundred twenty-two billion, one hundred sixty-four million, one hundred seventy-seven thousand, eight hundred twenty-eight".